64742453 has 4 divisors (see below), whose sum is σ = 66120000. Its totient is φ = 63364908.

The previous prime is 64742449. The next prime is 64742467. The reversal of 64742453 is 35424746.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 64742453 - 2² = 64742449 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64742423) 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, 688703 + ... + 688796.

It is an arithmetic number, because the mean of its divisors is an integer number (16530000).

Almost surely, 2^64742453 is an apocalyptic number.

It is an amenable number.

64742453 is a deficient number, since it is larger than the sum of its proper divisors (1377547).

64742453 is a wasteful number, since it uses less digits than its factorization.

64742453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1377546.

The product of its digits is 80640, while the sum is 35.

The square root of 64742453 is about 8046.2695082877. The cubic root of 64742453 is about 401.5408340382.

The spelling of 64742453 in words is "sixty-four million, seven hundred forty-two thousand, four hundred fifty-three".