918893661 has 32 divisors (see below), whose sum is σ = 1456078848. Its totient is φ = 504385920.

The previous prime is 918893629. The next prime is 918893669. The reversal of 918893661 is 166398819.

It is not a de Polignac number, because 918893661 - 2⁵ = 918893629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (918893669) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 84036 + ... + 94338.

It is an arithmetic number, because the mean of its divisors is an integer number (45502464).

Almost surely, 2^918893661 is an apocalyptic number.

It is an amenable number.

918893661 is a deficient number, since it is larger than the sum of its proper divisors (537185187).

918893661 is a wasteful number, since it uses less digits than its factorization.

918893661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10481.

The product of its digits is 559872, while the sum is 51.

The square root of 918893661 is about 30313.2588317390. The cubic root of 918893661 is about 972.1988100758.

The spelling of 918893661 in words is "nine hundred eighteen million, eight hundred ninety-three thousand, six hundred sixty-one".