79775587 has 2 divisors, whose sum is σ = 79775588. Its totient is φ = 79775586.

The previous prime is 79775573. The next prime is 79775593. The reversal of 79775587 is 78557797.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 79775587 - 2¹¹ = 79773539 is a prime.

It is not a weakly prime, because it can be changed into another prime (79775537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39887793 + 39887794.

It is an arithmetic number, because the mean of its divisors is an integer number (39887794).

Almost surely, 2^79775587 is an apocalyptic number.

79775587 is a deficient number, since it is larger than the sum of its proper divisors (1).

79775587 is an equidigital number, since it uses as much as digits as its factorization.

79775587 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4321800, while the sum is 55.

The square root of 79775587 is about 8931.7180318234. The cubic root of 79775587 is about 430.4836580556.

The spelling of 79775587 in words is "seventy-nine million, seven hundred seventy-five thousand, five hundred eighty-seven".