87549793 has 2 divisors, whose sum is σ = 87549794. Its totient is φ = 87549792.

The previous prime is 87549773. The next prime is 87549809. The reversal of 87549793 is 39794578.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52301824 + 35247969 = 7232^2 + 5937^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87549793 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87549793.

It is not a weakly prime, because it can be changed into another prime (87549773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43774896 + 43774897.

It is an arithmetic number, because the mean of its divisors is an integer number (43774897).

Almost surely, 2^87549793 is an apocalyptic number.

It is an amenable number.

87549793 is a deficient number, since it is larger than the sum of its proper divisors (1).

87549793 is an equidigital number, since it uses as much as digits as its factorization.

87549793 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1905120, while the sum is 52.

The square root of 87549793 is about 9356.8046361993. The cubic root of 87549793 is about 444.0361971004.

The spelling of 87549793 in words is "eighty-seven million, five hundred forty-nine thousand, seven hundred ninety-three".