190391901 has 12 divisors (see below), whose sum is σ = 295301952. Its totient is φ = 108795288.

The previous prime is 190391897. The next prime is 190391933. The reversal of 190391901 is 109193091.

It is not a de Polignac number, because 190391901 - 2² = 190391897 is a prime.

It is a super-4 number, since 4×190391901⁴ (a number of 34 digits) contains 4444 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190393901) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 647445 + ... + 647738.

It is an arithmetic number, because the mean of its divisors is an integer number (24608496).

Almost surely, 2^190391901 is an apocalyptic number.

It is an amenable number.

190391901 is a deficient number, since it is larger than the sum of its proper divisors (104910051).

190391901 is a wasteful number, since it uses less digits than its factorization.

190391901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1295200 (or 1295193 counting only the distinct ones).

The product of its (nonzero) digits is 2187, while the sum is 33.

The square root of 190391901 is about 13798.2571725563. The cubic root of 190391901 is about 575.2846993414.

The spelling of 190391901 in words is "one hundred ninety million, three hundred ninety-one thousand, nine hundred one".