87399461956 has 27 divisors (see below), whose sum is σ = 155945253751. Its totient is φ = 42859834784.

The previous prime is 87399461951. The next prime is 87399461959. The reversal of 87399461956 is 65916499378.

The square root of 87399461956 is 295634.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 10772364100 + 76627097856 = 103790^2 + 276816^2 .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 87399461891 and 87399461900.

It is not an unprimeable number, because it can be changed into a prime (87399461951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 31335810 + ... + 31338598.

Almost surely, 2^87399461956 is an apocalyptic number.

87399461956 is the 295634-th square number.

It is an amenable number.

87399461956 is a deficient number, since it is larger than the sum of its proper divisors (68545791795).

87399461956 is an frugal number, since it uses more digits than its factorization.

87399461956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5688 (or 2844 counting only the distinct ones).

The product of its digits is 88179840, while the sum is 67.

The spelling of 87399461956 in words is "eighty-seven billion, three hundred ninety-nine million, four hundred sixty-one thousand, nine hundred fifty-six".