87772877 has 2 divisors, whose sum is σ = 87772878. Its totient is φ = 87772876.

The previous prime is 87772859. The next prime is 87772897. The reversal of 87772877 is 77827778.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66113161 + 21659716 = 8131^2 + 4654^2 .

It is a cyclic number.

It is not a de Polignac number, because 87772877 - 2¹⁸ = 87510733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87772897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43886438 + 43886439.

It is an arithmetic number, because the mean of its divisors is an integer number (43886439).

Almost surely, 2^87772877 is an apocalyptic number.

It is an amenable number.

87772877 is a deficient number, since it is larger than the sum of its proper divisors (1).

87772877 is an equidigital number, since it uses as much as digits as its factorization.

87772877 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2151296, while the sum is 53.

The square root of 87772877 is about 9368.7180019467. The cubic root of 87772877 is about 444.4130240126.

The spelling of 87772877 in words is "eighty-seven million, seven hundred seventy-two thousand, eight hundred seventy-seven".