63431290 has 16 divisors (see below), whose sum is σ = 122959368. Its totient is φ = 23420736.

The previous prime is 63431273. The next prime is 63431327. The reversal of 63431290 is 9213436.

It can be written as a sum of positive squares in 4 ways, for example, as 57714409 + 5716881 = 7597^2 + 2391^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 243837 + ... + 244096.

Almost surely, 2^63431290 is an apocalyptic number.

63431290 is a deficient number, since it is larger than the sum of its proper divisors (59528078).

63431290 is a wasteful number, since it uses less digits than its factorization.

63431290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487953.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 63431290 is about 7964.3763095424. The cubic root of 63431290 is about 398.8116606199.

The spelling of 63431290 in words is "sixty-three million, four hundred thirty-one thousand, two hundred ninety".