64253903 has 4 divisors (see below), whose sum is σ = 73433040. Its totient is φ = 55074768.

The previous prime is 64253899. The next prime is 64253909. The reversal of 64253903 is 30935246.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30935246 = 2 ⋅15467623.

It is not a de Polignac number, because 64253903 - 2² = 64253899 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64253903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64253909) 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, 4589558 + ... + 4589571.

It is an arithmetic number, because the mean of its divisors is an integer number (18358260).

Almost surely, 2^64253903 is an apocalyptic number.

64253903 is a deficient number, since it is larger than the sum of its proper divisors (9179137).

64253903 is an equidigital number, since it uses as much as digits as its factorization.

64253903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9179136.

The product of its (nonzero) digits is 19440, while the sum is 32.

The square root of 64253903 is about 8015.8532296943. The cubic root of 64253903 is about 400.5282666122.

It can be divided in two parts, 64253 and 903, that added together give a palindrome (65156).

The spelling of 64253903 in words is "sixty-four million, two hundred fifty-three thousand, nine hundred three".