64746431 has 4 divisors (see below), whose sum is σ = 64765032. Its totient is φ = 64727832.

The previous prime is 64746427. The next prime is 64746439. The reversal of 64746431 is 13464746.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13464746 = 2 ⋅6732373.

It is a cyclic number.

It is not a de Polignac number, because 64746431 - 2² = 64746427 is a prime.

It is a super-2 number, since 2×64746431² = 8384200654475522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64746391 and 64746400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64746439) 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, 2345 + ... + 11618.

It is an arithmetic number, because the mean of its divisors is an integer number (16191258).

Almost surely, 2^64746431 is an apocalyptic number.

64746431 is a deficient number, since it is larger than the sum of its proper divisors (18601).

64746431 is a wasteful number, since it uses less digits than its factorization.

64746431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18600.

The product of its digits is 48384, while the sum is 35.

The square root of 64746431 is about 8046.5166997900. The cubic root of 64746431 is about 401.5490578885.

The spelling of 64746431 in words is "sixty-four million, seven hundred forty-six thousand, four hundred thirty-one".