1691923902 has 16 divisors (see below), whose sum is σ = 3384342912. Its totient is φ = 563892120.

The previous prime is 1691923879. The next prime is 1691923903. The reversal of 1691923902 is 2093291961.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1691923903) 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, 35577 + ... + 68187.

It is an arithmetic number, because the mean of its divisors is an integer number (211521432).

Almost surely, 2^1691923902 is an apocalyptic number.

1691923902 is an abundant number, since it is smaller than the sum of its proper divisors (1692419010).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1691923902 is a wasteful number, since it uses less digits than its factorization.

1691923902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41263.

The product of its (nonzero) digits is 52488, while the sum is 42.

The square root of 1691923902 is about 41133.0025891619. The cubic root of 1691923902 is about 1191.5902525232.

The spelling of 1691923902 in words is "one billion, six hundred ninety-one million, nine hundred twenty-three thousand, nine hundred two".