88491643 has 2 divisors, whose sum is σ = 88491644. Its totient is φ = 88491642.

The previous prime is 88491619. The next prime is 88491659. The reversal of 88491643 is 34619488.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 88491643 - 2⁹ = 88491131 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 88491643.

It is not a weakly prime, because it can be changed into another prime (88491343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44245821 + 44245822.

It is an arithmetic number, because the mean of its divisors is an integer number (44245822).

Almost surely, 2^88491643 is an apocalyptic number.

88491643 is a deficient number, since it is larger than the sum of its proper divisors (1).

88491643 is an equidigital number, since it uses as much as digits as its factorization.

88491643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 165888, while the sum is 43.

The square root of 88491643 is about 9406.9996810885. Note that the first 3 decimals coincide. The cubic root of 88491643 is about 445.6228168343.

The spelling of 88491643 in words is "eighty-eight million, four hundred ninety-one thousand, six hundred forty-three".