893974991 has 16 divisors (see below), whose sum is σ = 1100994048. Its totient is φ = 706860000.

The previous prime is 893974973. The next prime is 893974997. The reversal of 893974991 is 199479398.

It is not a de Polignac number, because 893974991 - 2²² = 889780687 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 893974991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (893974997) 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, 230216 + ... + 234066.

It is an arithmetic number, because the mean of its divisors is an integer number (68812128).

Almost surely, 2^893974991 is an apocalyptic number.

893974991 is a deficient number, since it is larger than the sum of its proper divisors (207019057).

893974991 is a wasteful number, since it uses less digits than its factorization.

893974991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6422.

The product of its digits is 4408992, while the sum is 59.

The square root of 893974991 is about 29899.4145594859. The cubic root of 893974991 is about 963.3300840664.

The spelling of 893974991 in words is "eight hundred ninety-three million, nine hundred seventy-four thousand, nine hundred ninety-one".