88309993 has 2 divisors, whose sum is σ = 88309994. Its totient is φ = 88309992.

The previous prime is 88309981. The next prime is 88309999. The reversal of 88309993 is 39990388.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80514729 + 7795264 = 8973^2 + 2792^2 .

It is a cyclic number.

It is not a de Polignac number, because 88309993 - 2¹⁷ = 88178921 is a prime.

It is not a weakly prime, because it can be changed into another prime (88309999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44154996 + 44154997.

It is an arithmetic number, because the mean of its divisors is an integer number (44154997).

Almost surely, 2^88309993 is an apocalyptic number.

It is an amenable number.

88309993 is a deficient number, since it is larger than the sum of its proper divisors (1).

88309993 is an equidigital number, since it uses as much as digits as its factorization.

88309993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 419904, while the sum is 49.

The square root of 88309993 is about 9397.3396767383. The cubic root of 88309993 is about 445.3176925948.

The spelling of 88309993 in words is "eighty-eight million, three hundred nine thousand, nine hundred ninety-three".