391982041 has 24 divisors (see below), whose sum is σ = 440921600. Its totient is φ = 348131520.

The previous prime is 391982029. The next prime is 391982047. The reversal of 391982041 is 140289193.

It is not a de Polignac number, because 391982041 - 2¹⁵ = 391949273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (391982047) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1757656 + ... + 1757878.

Almost surely, 2^391982041 is an apocalyptic number.

It is an amenable number.

391982041 is a deficient number, since it is larger than the sum of its proper divisors (48939559).

391982041 is a wasteful number, since it uses less digits than its factorization.

391982041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517 (or 506 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 391982041 is about 19798.5363347900. The cubic root of 391982041 is about 731.8499653932.

The spelling of 391982041 in words is "three hundred ninety-one million, nine hundred eighty-two thousand, forty-one".