63739697 has 4 divisors (see below), whose sum is σ = 72845376. Its totient is φ = 54634020.

The previous prime is 63739679. The next prime is 63739703. The reversal of 63739697 is 79693736.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-63739697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63739597) 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, 4552829 + ... + 4552842.

It is an arithmetic number, because the mean of its divisors is an integer number (18211344).

Almost surely, 2^63739697 is an apocalyptic number.

It is an amenable number.

63739697 is a deficient number, since it is larger than the sum of its proper divisors (9105679).

63739697 is an equidigital number, since it uses as much as digits as its factorization.

63739697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9105678.

The product of its digits is 1285956, while the sum is 50.

The square root of 63739697 is about 7983.7144863779. The cubic root of 63739697 is about 399.4569652000.

The spelling of 63739697 in words is "sixty-three million, seven hundred thirty-nine thousand, six hundred ninety-seven".