390138913 has 8 divisors (see below), whose sum is σ = 412970400. Its totient is φ = 367537248.

The previous prime is 390138911. The next prime is 390138919. The reversal of 390138913 is 319831093.

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 390138913 - 2¹ = 390138911 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (390138911) 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, 53956 + ... + 60757.

It is an arithmetic number, because the mean of its divisors is an integer number (51621300).

Almost surely, 2^390138913 is an apocalyptic number.

It is an amenable number.

390138913 is a deficient number, since it is larger than the sum of its proper divisors (22831487).

390138913 is a wasteful number, since it uses less digits than its factorization.

390138913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114911.

The product of its (nonzero) digits is 17496, while the sum is 37.

The square root of 390138913 is about 19751.9344115962. The cubic root of 390138913 is about 730.7010922649.

The spelling of 390138913 in words is "three hundred ninety million, one hundred thirty-eight thousand, nine hundred thirteen".