391961494 has 8 divisors (see below), whose sum is σ = 590230728. Its totient is φ = 195217920.

The previous prime is 391961483. The next prime is 391961543. The reversal of 391961494 is 494169193.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 380772 + ... + 381799.

It is an arithmetic number, because the mean of its divisors is an integer number (73778841).

Almost surely, 2^391961494 is an apocalyptic number.

391961494 is a deficient number, since it is larger than the sum of its proper divisors (198269234).

391961494 is a wasteful number, since it uses less digits than its factorization.

391961494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 762830.

The product of its digits is 209952, while the sum is 46.

The square root of 391961494 is about 19798.0174259950. The cubic root of 391961494 is about 731.8371777462.

The spelling of 391961494 in words is "three hundred ninety-one million, nine hundred sixty-one thousand, four hundred ninety-four".