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19119901 = 316110111
BaseRepresentation
bin100100011101…
…1111100011101
31022222101120111
41020323330131
514343314101
61521450021
7321342103
oct110737435
938871514
1019119901
11a87a079
1264a0911
133c65968
142779c73
151a2a251
hex123bf1d

19119901 has 8 divisors (see below), whose sum is σ = 20062208. Its totient is φ = 18198000.

The previous prime is 19119887. The next prime is 19119911. The reversal of 19119901 is 10991191.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19119901 - 25 = 19119869 is a prime.

It is a super-2 number, since 2×191199012 = 731141228499602, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19119911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3165 + ... + 6946.

It is an arithmetic number, because the mean of its divisors is an integer number (2507776).

Almost surely, 219119901 is an apocalyptic number.

19119901 is the 1956-th centered decagonal number.

It is an amenable number.

19119901 is a deficient number, since it is larger than the sum of its proper divisors (942307).

19119901 is a wasteful number, since it uses less digits than its factorization.

19119901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10203.

The product of its (nonzero) digits is 729, while the sum is 31.

The square root of 19119901 is about 4372.6309014139. The cubic root of 19119901 is about 267.4002935828.

The spelling of 19119901 in words is "nineteen million, one hundred nineteen thousand, nine hundred one".

Divisors: 1 31 61 1891 10111 313441 616771 19119901