53402069 has 4 divisors (see below), whose sum is σ = 61030944. Its totient is φ = 45773196.

The previous prime is 53402051. The next prime is 53402093. The reversal of 53402069 is 96020435.

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 not a de Polignac number, because 53402069 - 2¹⁶ = 53336533 is a prime.

It is a super-2 number, since 2×53402069² = 5703561946961522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53402009) 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, 3814427 + ... + 3814440.

It is an arithmetic number, because the mean of its divisors is an integer number (15257736).

Almost surely, 2^53402069 is an apocalyptic number.

It is an amenable number.

53402069 is a deficient number, since it is larger than the sum of its proper divisors (7628875).

53402069 is an equidigital number, since it uses as much as digits as its factorization.

53402069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7628874.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 53402069 is about 7307.6719275019. The cubic root of 53402069 is about 376.5760489802.

The spelling of 53402069 in words is "fifty-three million, four hundred two thousand, sixty-nine".