390121093 has 4 divisors (see below), whose sum is σ = 390504960. Its totient is φ = 389737228.

The previous prime is 390121057. The next prime is 390121097.

390121093 is nontrivially palindromic in base 10.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-390121093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390121097) 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, 190405 + ... + 192442.

It is an arithmetic number, because the mean of its divisors is an integer number (97626240).

Almost surely, 2^390121093 is an apocalyptic number.

It is an amenable number.

390121093 is a deficient number, since it is larger than the sum of its proper divisors (383867).

390121093 is a wasteful number, since it uses less digits than its factorization.

390121093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383866.

The product of its (nonzero) digits is 1458, while the sum is 28.

The square root of 390121093 is about 19751.4833113870. The cubic root of 390121093 is about 730.6899669184.

The spelling of 390121093 in words is "three hundred ninety million, one hundred twenty-one thousand, ninety-three".