87657133 has 2 divisors, whose sum is σ = 87657134. Its totient is φ = 87657132.

The previous prime is 87657113. The next prime is 87657137. The reversal of 87657133 is 33175678.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87553449 + 103684 = 9357^2 + 322^2 .

It is a cyclic number.

It is not a de Polignac number, because 87657133 - 2¹³ = 87648941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87657137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43828566 + 43828567.

It is an arithmetic number, because the mean of its divisors is an integer number (43828567).

Almost surely, 2^87657133 is an apocalyptic number.

It is an amenable number.

87657133 is a deficient number, since it is larger than the sum of its proper divisors (1).

87657133 is an equidigital number, since it uses as much as digits as its factorization.

87657133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 105840, while the sum is 40.

The square root of 87657133 is about 9362.5388116686. The cubic root of 87657133 is about 444.2175924644.

The spelling of 87657133 in words is "eighty-seven million, six hundred fifty-seven thousand, one hundred thirty-three".