391412137 has 8 divisors (see below), whose sum is σ = 414184320. Its totient is φ = 369119520.

The previous prime is 391412129. The next prime is 391412143. The reversal of 391412137 is 731214193.

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

It is a cyclic number.

It is not a de Polignac number, because 391412137 - 2³ = 391412129 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 391412099 and 391412108.

It is not an unprimeable number, because it can be changed into a prime (391412167) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118212 + ... + 121477.

It is an arithmetic number, because the mean of its divisors is an integer number (51773040).

Almost surely, 2^391412137 is an apocalyptic number.

It is an amenable number.

391412137 is a deficient number, since it is larger than the sum of its proper divisors (22772183).

391412137 is a wasteful number, since it uses less digits than its factorization.

391412137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239783.

The product of its digits is 4536, while the sum is 31.

The square root of 391412137 is about 19784.1385205422. The cubic root of 391412137 is about 731.4951136604.

The spelling of 391412137 in words is "three hundred ninety-one million, four hundred twelve thousand, one hundred thirty-seven".