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11920657 = 719471907
BaseRepresentation
bin101101011110…
…010100010001
3211102122001211
4231132110101
511022430112
61103300121
7203216050
oct55362421
924378054
1011920657
116802191
123baa641
132614b58
141824397
1510a70a7
hexb5e511

11920657 has 16 divisors (see below), whose sum is σ = 14653440. Its totient is φ = 9469008.

The previous prime is 11920639. The next prime is 11920661. The reversal of 11920657 is 75602911.

11920657 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 11920657 - 27 = 11920529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11920637) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5298 + ... + 7204.

It is an arithmetic number, because the mean of its divisors is an integer number (915840).

It is a vampire number, since it can be written as 19076251 (with its own digits).

Almost surely, 211920657 is an apocalyptic number.

It is an amenable number.

11920657 is a deficient number, since it is larger than the sum of its proper divisors (2732783).

11920657 is a wasteful number, since it uses less digits than its factorization.

11920657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1980.

The product of its (nonzero) digits is 3780, while the sum is 31.

The square root of 11920657 is about 3452.6304464857. The cubic root of 11920657 is about 228.4371486405.

The spelling of 11920657 in words is "eleven million, nine hundred twenty thousand, six hundred fifty-seven".

Divisors: 1 7 19 47 133 329 893 1907 6251 13349 36233 89629 253631 627403 1702951 11920657