88721291 has 2 divisors, whose sum is σ = 88721292. Its totient is φ = 88721290.

The previous prime is 88721261. The next prime is 88721293. The reversal of 88721291 is 19212788.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-88721291 is a prime.

Together with 88721293, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (88721293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44360645 + 44360646.

It is an arithmetic number, because the mean of its divisors is an integer number (44360646).

Almost surely, 2^88721291 is an apocalyptic number.

88721291 is a deficient number, since it is larger than the sum of its proper divisors (1).

88721291 is an equidigital number, since it uses as much as digits as its factorization.

88721291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 38.

The square root of 88721291 is about 9419.1980019532. The cubic root of 88721291 is about 446.0079680452.

The spelling of 88721291 in words is "eighty-eight million, seven hundred twenty-one thousand, two hundred ninety-one".