75872639 has 2 divisors, whose sum is σ = 75872640. Its totient is φ = 75872638.

The previous prime is 75872633. The next prime is 75872651. The reversal of 75872639 is 93627857.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 75872639 - 2¹² = 75868543 is a prime.

It is a super-4 number, since 4×75872639⁴ (a number of 33 digits) contains 4444 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 75872593 and 75872602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75872633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37936319 + 37936320.

It is an arithmetic number, because the mean of its divisors is an integer number (37936320).

Almost surely, 2^75872639 is an apocalyptic number.

75872639 is a deficient number, since it is larger than the sum of its proper divisors (1).

75872639 is an equidigital number, since it uses as much as digits as its factorization.

75872639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 635040, while the sum is 47.

The square root of 75872639 is about 8710.4901699043. The cubic root of 75872639 is about 423.3456126528.

The spelling of 75872639 in words is "seventy-five million, eight hundred seventy-two thousand, six hundred thirty-nine".