53399407 has 4 divisors (see below), whose sum is σ = 53928216. Its totient is φ = 52870600.

The previous prime is 53399389. The next prime is 53399413. The reversal of 53399407 is 70499335.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70499335 = 5 ⋅14099867.

It is a cyclic number.

It is not a de Polignac number, because 53399407 - 2²³ = 45010799 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 53399407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53399417) 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, 264253 + ... + 264454.

It is an arithmetic number, because the mean of its divisors is an integer number (13482054).

Almost surely, 2^53399407 is an apocalyptic number.

53399407 is a deficient number, since it is larger than the sum of its proper divisors (528809).

53399407 is a wasteful number, since it uses less digits than its factorization.

53399407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528808.

The product of its (nonzero) digits is 102060, while the sum is 40.

The square root of 53399407 is about 7307.4897878820. The cubic root of 53399407 is about 376.5697916565.

The spelling of 53399407 in words is "fifty-three million, three hundred ninety-nine thousand, four hundred seven".