87922973 has 2 divisors, whose sum is σ = 87922974. Its totient is φ = 87922972.

The previous prime is 87922957. The next prime is 87922981. The reversal of 87922973 is 37922978.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83850649 + 4072324 = 9157^2 + 2018^2 .

It is a cyclic number.

It is not a de Polignac number, because 87922973 - 2⁴ = 87922957 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87922993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43961486 + 43961487.

It is an arithmetic number, because the mean of its divisors is an integer number (43961487).

Almost surely, 2^87922973 is an apocalyptic number.

It is an amenable number.

87922973 is a deficient number, since it is larger than the sum of its proper divisors (1).

87922973 is an equidigital number, since it uses as much as digits as its factorization.

87922973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 381024, while the sum is 47.

The square root of 87922973 is about 9376.7250679542. The cubic root of 87922973 is about 444.6662025679. Note that the first 3 decimals are identical.

The spelling of 87922973 in words is "eighty-seven million, nine hundred twenty-two thousand, nine hundred seventy-three".