87223978 has 4 divisors (see below), whose sum is σ = 130835970. Its totient is φ = 43611988.

The previous prime is 87223951. The next prime is 87224051. The reversal of 87223978 is 87932278.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 86620249 + 603729 = 9307^2 + 777^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21805993 + ... + 21805996.

Almost surely, 2^87223978 is an apocalyptic number.

87223978 is a deficient number, since it is larger than the sum of its proper divisors (43611992).

87223978 is a wasteful number, since it uses less digits than its factorization.

87223978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43611991.

The product of its digits is 338688, while the sum is 46.

The square root of 87223978 is about 9339.3778165357. The cubic root of 87223978 is about 443.4846881157.

The spelling of 87223978 in words is "eighty-seven million, two hundred twenty-three thousand, nine hundred seventy-eight".