87280979 has 2 divisors, whose sum is σ = 87280980. Its totient is φ = 87280978.

The previous prime is 87280957. The next prime is 87280993. The reversal of 87280979 is 97908278.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87280979 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (87280079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43640489 + 43640490.

It is an arithmetic number, because the mean of its divisors is an integer number (43640490).

Almost surely, 2^87280979 is an apocalyptic number.

87280979 is a deficient number, since it is larger than the sum of its proper divisors (1).

87280979 is an equidigital number, since it uses as much as digits as its factorization.

87280979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 508032, while the sum is 50.

The square root of 87280979 is about 9342.4289668159. The cubic root of 87280979 is about 443.5812730481.

The spelling of 87280979 in words is "eighty-seven million, two hundred eighty thousand, nine hundred seventy-nine".