64453971 has 8 divisors (see below), whose sum is σ = 86020560. Its totient is φ = 42928352.

The previous prime is 64453951. The next prime is 64453999. The reversal of 64453971 is 17935446.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64453971 - 2¹⁴ = 64437587 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64453931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6360 + ... + 13013.

It is an arithmetic number, because the mean of its divisors is an integer number (10752570).

Almost surely, 2^64453971 is an apocalyptic number.

64453971 is a deficient number, since it is larger than the sum of its proper divisors (21566589).

64453971 is a wasteful number, since it uses less digits than its factorization.

64453971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20485.

The product of its digits is 90720, while the sum is 39.

The square root of 64453971 is about 8028.3230503014. The cubic root of 64453971 is about 400.9435454715.

It can be divided in two parts, 644 and 53971, that added together give a triangular number (54615 = T₃₃₀).

The spelling of 64453971 in words is "sixty-four million, four hundred fifty-three thousand, nine hundred seventy-one".