385922431 has 2 divisors, whose sum is σ = 385922432. Its totient is φ = 385922430.

The previous prime is 385922429. The next prime is 385922437. The reversal of 385922431 is 134229583.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 385922431 - 2¹ = 385922429 is a prime.

It is a super-3 number, since 3×385922431³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 385922429, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (385922437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192961215 + 192961216.

It is an arithmetic number, because the mean of its divisors is an integer number (192961216).

Almost surely, 2^385922431 is an apocalyptic number.

385922431 is a deficient number, since it is larger than the sum of its proper divisors (1).

385922431 is an equidigital number, since it uses as much as digits as its factorization.

385922431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 37.

The square root of 385922431 is about 19644.9085261296. The cubic root of 385922431 is about 728.0591661600.

The spelling of 385922431 in words is "three hundred eighty-five million, nine hundred twenty-two thousand, four hundred thirty-one".