63149731 has 4 divisors (see below), whose sum is σ = 63228600. Its totient is φ = 63070864.

The previous prime is 63149699. The next prime is 63149741. The reversal of 63149731 is 13794136.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 63149731 - 2⁵ = 63149699 is a prime.

It is a super-2 number, since 2×63149731² = 7975777050744722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63149741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38221 + ... + 39838.

It is an arithmetic number, because the mean of its divisors is an integer number (15807150).

Almost surely, 2^63149731 is an apocalyptic number.

63149731 is a deficient number, since it is larger than the sum of its proper divisors (78869).

63149731 is an equidigital number, since it uses as much as digits as its factorization.

63149731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78868.

The product of its digits is 13608, while the sum is 34.

The square root of 63149731 is about 7946.6805019455. The cubic root of 63149731 is about 398.2207032432.

The spelling of 63149731 in words is "sixty-three million, one hundred forty-nine thousand, seven hundred thirty-one".