64454399 has 4 divisors (see below), whose sum is σ = 64598400. Its totient is φ = 64310400.

The previous prime is 64454393. The next prime is 64454431. The reversal of 64454399 is 99345446.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99345446 = 2 ⋅49672723.

It is a cyclic number.

It is not a de Polignac number, because 64454399 - 2¹² = 64450303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64454393) 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, 71327 + ... + 72224.

It is an arithmetic number, because the mean of its divisors is an integer number (16149600).

Almost surely, 2^64454399 is an apocalyptic number.

64454399 is a deficient number, since it is larger than the sum of its proper divisors (144001).

64454399 is a wasteful number, since it uses less digits than its factorization.

64454399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144000.

The product of its digits is 466560, while the sum is 44.

The square root of 64454399 is about 8028.3497058860. The cubic root of 64454399 is about 400.9444329444.

The spelling of 64454399 in words is "sixty-four million, four hundred fifty-four thousand, three hundred ninety-nine".