63654431 has 4 divisors (see below), whose sum is σ = 64855512. Its totient is φ = 62453352.

The previous prime is 63654421. The next prime is 63654457. The reversal of 63654431 is 13445636.

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 63654431 - 2¹⁰ = 63653407 is a prime.

It is a super-2 number, since 2×63654431² = 8103773171867522, 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 (63654401) 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, 600461 + ... + 600566.

It is an arithmetic number, because the mean of its divisors is an integer number (16213878).

Almost surely, 2^63654431 is an apocalyptic number.

63654431 is a deficient number, since it is larger than the sum of its proper divisors (1201081).

63654431 is a wasteful number, since it uses less digits than its factorization.

63654431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1201080.

The product of its digits is 25920, while the sum is 32.

The square root of 63654431 is about 7978.3727037536. The cubic root of 63654431 is about 399.2787649148.

The spelling of 63654431 in words is "sixty-three million, six hundred fifty-four thousand, four hundred thirty-one".