79889507 has 2 divisors, whose sum is σ = 79889508. Its totient is φ = 79889506.

The previous prime is 79889483. The next prime is 79889539. The reversal of 79889507 is 70598897.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 79889507 - 2¹⁶ = 79823971 is a prime.

It is not a weakly prime, because it can be changed into another prime (79889597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39944753 + 39944754.

It is an arithmetic number, because the mean of its divisors is an integer number (39944754).

Almost surely, 2^79889507 is an apocalyptic number.

79889507 is a deficient number, since it is larger than the sum of its proper divisors (1).

79889507 is an equidigital number, since it uses as much as digits as its factorization.

79889507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1270080, while the sum is 53.

The square root of 79889507 is about 8938.0930292764. The cubic root of 79889507 is about 430.6884716467.

The spelling of 79889507 in words is "seventy-nine million, eight hundred eighty-nine thousand, five hundred seven".