87708493 has 2 divisors, whose sum is σ = 87708494. Its totient is φ = 87708492.

The previous prime is 87708479. The next prime is 87708497. The reversal of 87708493 is 39480778.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84879369 + 2829124 = 9213^2 + 1682^2 .

It is a cyclic number.

It is not a de Polignac number, because 87708493 - 2²¹ = 85611341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87708497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43854246 + 43854247.

It is an arithmetic number, because the mean of its divisors is an integer number (43854247).

Almost surely, 2^87708493 is an apocalyptic number.

It is an amenable number.

87708493 is a deficient number, since it is larger than the sum of its proper divisors (1).

87708493 is an equidigital number, since it uses as much as digits as its factorization.

87708493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 338688, while the sum is 46.

The square root of 87708493 is about 9365.2812557872. The cubic root of 87708493 is about 444.3043340689.

The spelling of 87708493 in words is "eighty-seven million, seven hundred eight thousand, four hundred ninety-three".