42831493 has 2 divisors, whose sum is σ = 42831494. Its totient is φ = 42831492.

The previous prime is 42831479. The next prime is 42831499. The reversal of 42831493 is 39413824.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39526369 + 3305124 = 6287^2 + 1818^2 .

It is a cyclic number.

It is not a de Polignac number, because 42831493 - 2⁵ = 42831461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42831499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21415746 + 21415747.

It is an arithmetic number, because the mean of its divisors is an integer number (21415747).

Almost surely, 2^42831493 is an apocalyptic number.

It is an amenable number.

42831493 is a deficient number, since it is larger than the sum of its proper divisors (1).

42831493 is an equidigital number, since it uses as much as digits as its factorization.

42831493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 34.

The square root of 42831493 is about 6544.5773736736. The cubic root of 42831493 is about 349.8815735390.

It can be divided in two parts, 4283 and 1493, that added together give a square (5776 = 76²).

The spelling of 42831493 in words is "forty-two million, eight hundred thirty-one thousand, four hundred ninety-three".