63787531 has 2 divisors, whose sum is σ = 63787532. Its totient is φ = 63787530.

The previous prime is 63787499. The next prime is 63787543. The reversal of 63787531 is 13578736.

63787531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 63787531 - 2⁵ = 63787499 is a prime.

It is a super-2 number, since 2×63787531² = 8137698222151922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (63787561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31893765 + 31893766.

It is an arithmetic number, because the mean of its divisors is an integer number (31893766).

Almost surely, 2^63787531 is an apocalyptic number.

63787531 is a deficient number, since it is larger than the sum of its proper divisors (1).

63787531 is an equidigital number, since it uses as much as digits as its factorization.

63787531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 105840, while the sum is 40.

The square root of 63787531 is about 7986.7096479088. The cubic root of 63787531 is about 399.5568655108.

The spelling of 63787531 in words is "sixty-three million, seven hundred eighty-seven thousand, five hundred thirty-one".