87077591 has 2 divisors, whose sum is σ = 87077592. Its totient is φ = 87077590.

The previous prime is 87077531. The next prime is 87077603. The reversal of 87077591 is 19577078.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87077591 - 2⁶ = 87077527 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87077531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43538795 + 43538796.

It is an arithmetic number, because the mean of its divisors is an integer number (43538796).

Almost surely, 2^87077591 is an apocalyptic number.

87077591 is a deficient number, since it is larger than the sum of its proper divisors (1).

87077591 is an equidigital number, since it uses as much as digits as its factorization.

87077591 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 123480, while the sum is 44.

The square root of 87077591 is about 9331.5374403150. The cubic root of 87077591 is about 443.2364507739.

The spelling of 87077591 in words is "eighty-seven million, seventy-seven thousand, five hundred ninety-one".