390686093 has 4 divisors (see below), whose sum is σ = 446498400. Its totient is φ = 334873788.

The previous prime is 390686083. The next prime is 390686099.

390686093 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 not a de Polignac number, because 390686093 - 2⁴ = 390686077 is a prime.

It is a super-3 number, since 3×390686093³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390686099) 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, 27906143 + ... + 27906156.

It is an arithmetic number, because the mean of its divisors is an integer number (111624600).

Almost surely, 2^390686093 is an apocalyptic number.

It is an amenable number.

390686093 is a deficient number, since it is larger than the sum of its proper divisors (55812307).

390686093 is an equidigital number, since it uses as much as digits as its factorization.

390686093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55812306.

The product of its (nonzero) digits is 209952, while the sum is 44.

The square root of 390686093 is about 19765.7808598598. The cubic root of 390686093 is about 731.0425417967.

The spelling of 390686093 in words is "three hundred ninety million, six hundred eighty-six thousand, ninety-three".