390751493 has 4 divisors (see below), whose sum is σ = 426274368. Its totient is φ = 355228620.

The previous prime is 390751489. The next prime is 390751507. The reversal of 390751493 is 394157093.

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 390751493 - 2² = 390751489 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 390751493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390751453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17761421 + ... + 17761442.

It is an arithmetic number, because the mean of its divisors is an integer number (106568592).

Almost surely, 2^390751493 is an apocalyptic number.

It is an amenable number.

390751493 is a deficient number, since it is larger than the sum of its proper divisors (35522875).

390751493 is a wasteful number, since it uses less digits than its factorization.

390751493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35522874.

The product of its (nonzero) digits is 102060, while the sum is 41.

The square root of 390751493 is about 19767.4351649373. The cubic root of 390751493 is about 731.0833311632.

The spelling of 390751493 in words is "three hundred ninety million, seven hundred fifty-one thousand, four hundred ninety-three".