63513731 has 2 divisors, whose sum is σ = 63513732. Its totient is φ = 63513730.

The previous prime is 63513721. The next prime is 63513763. The reversal of 63513731 is 13731536.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 63513731 - 2¹⁴ = 63497347 is a prime.

It is a super-2 number, since 2×63513731² = 8067988051080722, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 63513694 and 63513703.

It is not a weakly prime, because it can be changed into another prime (63513701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31756865 + 31756866.

It is an arithmetic number, because the mean of its divisors is an integer number (31756866).

Almost surely, 2^63513731 is an apocalyptic number.

63513731 is a deficient number, since it is larger than the sum of its proper divisors (1).

63513731 is an equidigital number, since it uses as much as digits as its factorization.

63513731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5670, while the sum is 29.

The square root of 63513731 is about 7969.5502382506. The cubic root of 63513731 is about 398.9843629695.

The spelling of 63513731 in words is "sixty-three million, five hundred thirteen thousand, seven hundred thirty-one".