52642069 has 2 divisors, whose sum is σ = 52642070. Its totient is φ = 52642068.

The previous prime is 52642063. The next prime is 52642099. The reversal of 52642069 is 96024625.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46580625 + 6061444 = 6825^2 + 2462^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-52642069 is a prime.

It is a super-2 number, since 2×52642069² = 5542374857201522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52642063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26321034 + 26321035.

It is an arithmetic number, because the mean of its divisors is an integer number (26321035).

Almost surely, 2^52642069 is an apocalyptic number.

It is an amenable number.

52642069 is a deficient number, since it is larger than the sum of its proper divisors (1).

52642069 is an equidigital number, since it uses as much as digits as its factorization.

52642069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 52642069 is about 7255.4854420638. The cubic root of 52642069 is about 374.7810728065.

The spelling of 52642069 in words is "fifty-two million, six hundred forty-two thousand, sixty-nine".