390553391381 has 2 divisors, whose sum is σ = 390553391382. Its totient is φ = 390553391380.

The previous prime is 390553391377. The next prime is 390553391411. The reversal of 390553391381 is 183193355093.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 284825016100 + 105728375281 = 533690^2 + 325159^2 .

It is a cyclic number.

It is not a de Polignac number, because 390553391381 - 2² = 390553391377 is a prime.

It is a super-2 number, since 2×390553391381² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (390553391981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195276695690 + 195276695691.

It is an arithmetic number, because the mean of its divisors is an integer number (195276695691).

Almost surely, 2^390553391381 is an apocalyptic number.

It is an amenable number.

390553391381 is a deficient number, since it is larger than the sum of its proper divisors (1).

390553391381 is an equidigital number, since it uses as much as digits as its factorization.

390553391381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1312200, while the sum is 50.

The spelling of 390553391381 in words is "three hundred ninety billion, five hundred fifty-three million, three hundred ninety-one thousand, three hundred eighty-one".