52640069 has 8 divisors (see below), whose sum is σ = 53123808. Its totient is φ = 52158960.

The previous prime is 52640053. The next prime is 52640083. The reversal of 52640069 is 96004625.

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 52640069 - 2⁴ = 52640053 is a prime.

It is a super-2 number, since 2×52640069² = 5541953728649522, 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 (52640969) 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, 66494 + ... + 67280.

It is an arithmetic number, because the mean of its divisors is an integer number (6640476).

Almost surely, 2^52640069 is an apocalyptic number.

It is an amenable number.

52640069 is a deficient number, since it is larger than the sum of its proper divisors (483739).

52640069 is a wasteful number, since it uses less digits than its factorization.

52640069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1315.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 52640069 is about 7255.3476140017. The cubic root of 52640069 is about 374.7763264654.

The spelling of 52640069 in words is "fifty-two million, six hundred forty thousand, sixty-nine".