87224971 has 2 divisors, whose sum is σ = 87224972. Its totient is φ = 87224970.

The previous prime is 87224923. The next prime is 87224981. The reversal of 87224971 is 17942278.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87224971 - 2⁷ = 87224843 is a prime.

It is not a weakly prime, because it can be changed into another prime (87224911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43612485 + 43612486.

It is an arithmetic number, because the mean of its divisors is an integer number (43612486).

Almost surely, 2^87224971 is an apocalyptic number.

87224971 is a deficient number, since it is larger than the sum of its proper divisors (1).

87224971 is an equidigital number, since it uses as much as digits as its factorization.

87224971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56448, while the sum is 40.

The square root of 87224971 is about 9339.4309783841. The cubic root of 87224971 is about 443.4863710574.

The spelling of 87224971 in words is "eighty-seven million, two hundred twenty-four thousand, nine hundred seventy-one".