63749431 has 4 divisors (see below), whose sum is σ = 64208200. Its totient is φ = 63290664.

The previous prime is 63749419. The next prime is 63749443. The reversal of 63749431 is 13494736.

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

It is an interprime number because it is at equal distance from previous prime (63749419) and next prime (63749443).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63749431 is a prime.

It is a super-2 number, since 2×63749431² = 8127979905647522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63749131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 229176 + ... + 229453.

It is an arithmetic number, because the mean of its divisors is an integer number (16052050).

Almost surely, 2^63749431 is an apocalyptic number.

63749431 is a deficient number, since it is larger than the sum of its proper divisors (458769).

63749431 is a wasteful number, since it uses less digits than its factorization.

63749431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 458768.

The product of its digits is 54432, while the sum is 37.

The square root of 63749431 is about 7984.3240790940. The cubic root of 63749431 is about 399.4772985054.

The spelling of 63749431 in words is "sixty-three million, seven hundred forty-nine thousand, four hundred thirty-one".