891690014 has 32 divisors (see below), whose sum is σ = 1406287872. Its totient is φ = 423540000.

The previous prime is 891689993. The next prime is 891690031. The reversal of 891690014 is 410096198.

It is a happy number.

It is a super-2 number, since 2×891690014² = 1590222162134640392, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 891690014.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 819779 + ... + 820865.

It is an arithmetic number, because the mean of its divisors is an integer number (43946496).

Almost surely, 2^891690014 is an apocalyptic number.

891690014 is a deficient number, since it is larger than the sum of its proper divisors (514597858).

891690014 is a wasteful number, since it uses less digits than its factorization.

891690014 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1352.

The product of its (nonzero) digits is 15552, while the sum is 38.

The square root of 891690014 is about 29861.1790457108. The cubic root of 891690014 is about 962.5086348582.

The spelling of 891690014 in words is "eight hundred ninety-one million, six hundred ninety thousand, fourteen".