285374431 has 2 divisors, whose sum is σ = 285374432. Its totient is φ = 285374430.

The previous prime is 285374423. The next prime is 285374477. The reversal of 285374431 is 134473582.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 285374431 - 2³ = 285374423 is a prime.

It is a super-2 number, since 2×285374431² = 162877131737147522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (285374491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142687215 + 142687216.

It is an arithmetic number, because the mean of its divisors is an integer number (142687216).

Almost surely, 2^285374431 is an apocalyptic number.

285374431 is a deficient number, since it is larger than the sum of its proper divisors (1).

285374431 is an equidigital number, since it uses as much as digits as its factorization.

285374431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80640, while the sum is 37.

The square root of 285374431 is about 16893.0290652683. The cubic root of 285374431 is about 658.3725059779.

It can be divided in two parts, 2853 and 74431, that added together give a square (77284 = 278²).

The spelling of 285374431 in words is "two hundred eighty-five million, three hundred seventy-four thousand, four hundred thirty-one".