53402023 has 4 divisors (see below), whose sum is σ = 54277528. Its totient is φ = 52526520.

The previous prime is 53402009. The next prime is 53402029. The reversal of 53402023 is 32020435.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53402023 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 (53402029) 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, 437661 + ... + 437782.

It is an arithmetic number, because the mean of its divisors is an integer number (13569382).

Almost surely, 2^53402023 is an apocalyptic number.

53402023 is a deficient number, since it is larger than the sum of its proper divisors (875505).

53402023 is an equidigital number, since it uses as much as digits as its factorization.

53402023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 875504.

The product of its (nonzero) digits is 720, while the sum is 19.

The square root of 53402023 is about 7307.6687801241. The cubic root of 53402023 is about 376.5759408539.

Adding to 53402023 its reverse (32020435), we get a palindrome (85422458).

The spelling of 53402023 in words is "fifty-three million, four hundred two thousand, twenty-three".