63631749 has 16 divisors (see below), whose sum is σ = 88996608. Its totient is φ = 40393152.

The previous prime is 63631739. The next prime is 63631751. The reversal of 63631749 is 94713636.

It is not a de Polignac number, because 63631749 - 2¹³ = 63623557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63631739) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 882 + ... + 11315.

It is an arithmetic number, because the mean of its divisors is an integer number (5562288).

Almost surely, 2^63631749 is an apocalyptic number.

It is an amenable number.

63631749 is a deficient number, since it is larger than the sum of its proper divisors (25364859).

63631749 is a wasteful number, since it uses less digits than its factorization.

63631749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12284.

The product of its digits is 81648, while the sum is 39.

The square root of 63631749 is about 7976.9511092898. The cubic root of 63631749 is about 399.2313342452.

It can be divided in two parts, 636 and 31749, that added together give a triangular number (32385 = T₂₅₄).

The spelling of 63631749 in words is "sixty-three million, six hundred thirty-one thousand, seven hundred forty-nine".