87997093 has 2 divisors, whose sum is σ = 87997094. Its totient is φ = 87997092.

The previous prime is 87997081. The next prime is 87997097. The reversal of 87997093 is 39079978.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85507009 + 2490084 = 9247^2 + 1578^2 .

It is a cyclic number.

It is not a de Polignac number, because 87997093 - 2²¹ = 85899941 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87997093.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87997097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43998546 + 43998547.

It is an arithmetic number, because the mean of its divisors is an integer number (43998547).

Almost surely, 2^87997093 is an apocalyptic number.

It is an amenable number.

87997093 is a deficient number, since it is larger than the sum of its proper divisors (1).

87997093 is an equidigital number, since it uses as much as digits as its factorization.

87997093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 857304, while the sum is 52.

The square root of 87997093 is about 9380.6765747466. The cubic root of 87997093 is about 444.7911202492.

The spelling of 87997093 in words is "eighty-seven million, nine hundred ninety-seven thousand, ninety-three".