87721496 has 16 divisors (see below), whose sum is σ = 174153240. Its totient is φ = 41280640.

The previous prime is 87721493. The next prime is 87721507. The reversal of 87721496 is 69412778.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87721493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 322370 + ... + 322641.

Almost surely, 2^87721496 is an apocalyptic number.

It is an amenable number.

87721496 is a deficient number, since it is larger than the sum of its proper divisors (86431744).

87721496 is a wasteful number, since it uses less digits than its factorization.

87721496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645034 (or 645030 counting only the distinct ones).

The product of its digits is 169344, while the sum is 44.

The square root of 87721496 is about 9365.9754430598. The cubic root of 87721496 is about 444.3262893877.

The spelling of 87721496 in words is "eighty-seven million, seven hundred twenty-one thousand, four hundred ninety-six".