87700905 has 12 divisors (see below), whose sum is σ = 152014980. Its totient is φ = 46773792.

The previous prime is 87700853. The next prime is 87700933. The reversal of 87700905 is 50900778.

It can be written as a sum of positive squares in 2 ways, for example, as 28164249 + 59536656 = 5307^2 + 7716^2 .

It is not a de Polignac number, because 87700905 - 2⁷ = 87700777 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87700905.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 974410 + ... + 974499.

It is an arithmetic number, because the mean of its divisors is an integer number (12667915).

Almost surely, 2^87700905 is an apocalyptic number.

It is an amenable number.

87700905 is a deficient number, since it is larger than the sum of its proper divisors (64314075).

87700905 is a wasteful number, since it uses less digits than its factorization.

87700905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1948920 (or 1948917 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 36.

The square root of 87700905 is about 9364.8761337244. The cubic root of 87700905 is about 444.2915208722.

The spelling of 87700905 in words is "eighty-seven million, seven hundred thousand, nine hundred five".