931978941 has 4 divisors (see below), whose sum is σ = 1242638592. Its totient is φ = 621319292.

The previous prime is 931978939. The next prime is 931978963. The reversal of 931978941 is 149879139.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 149879139 = 3 ⋅49959713.

It is a cyclic number.

It is not a de Polignac number, because 931978941 - 2¹ = 931978939 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (931978991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 155329821 + ... + 155329826.

It is an arithmetic number, because the mean of its divisors is an integer number (310659648).

Almost surely, 2^931978941 is an apocalyptic number.

It is an amenable number.

931978941 is a deficient number, since it is larger than the sum of its proper divisors (310659651).

931978941 is a wasteful number, since it uses less digits than its factorization.

931978941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310659650.

The product of its digits is 489888, while the sum is 51.

The square root of 931978941 is about 30528.3301377589. The cubic root of 931978941 is about 976.7918628052.

The spelling of 931978941 in words is "nine hundred thirty-one million, nine hundred seventy-eight thousand, nine hundred forty-one".