87452779 has 2 divisors, whose sum is σ = 87452780. Its totient is φ = 87452778.

The previous prime is 87452773. The next prime is 87452821. The reversal of 87452779 is 97725478.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87452779 - 2¹³ = 87444587 is a prime.

It is not a weakly prime, because it can be changed into another prime (87452773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43726389 + 43726390.

It is an arithmetic number, because the mean of its divisors is an integer number (43726390).

Almost surely, 2^87452779 is an apocalyptic number.

87452779 is a deficient number, since it is larger than the sum of its proper divisors (1).

87452779 is an equidigital number, since it uses as much as digits as its factorization.

87452779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 987840, while the sum is 49.

The square root of 87452779 is about 9351.6190576819. The cubic root of 87452779 is about 443.8721241866.

The spelling of 87452779 in words is "eighty-seven million, four hundred fifty-two thousand, seven hundred seventy-nine".