88661491 has 2 divisors, whose sum is σ = 88661492. Its totient is φ = 88661490.

The previous prime is 88661479. The next prime is 88661539. The reversal of 88661491 is 19416688.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 88661491 - 2⁵ = 88661459 is a prime.

It is not a weakly prime, because it can be changed into another prime (88661431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44330745 + 44330746.

It is an arithmetic number, because the mean of its divisors is an integer number (44330746).

Almost surely, 2^88661491 is an apocalyptic number.

88661491 is a deficient number, since it is larger than the sum of its proper divisors (1).

88661491 is an equidigital number, since it uses as much as digits as its factorization.

88661491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82944, while the sum is 43.

The square root of 88661491 is about 9416.0230989521. The cubic root of 88661491 is about 445.9077392998.

The spelling of 88661491 in words is "eighty-eight million, six hundred sixty-one thousand, four hundred ninety-one".