88421691 has 8 divisors (see below), whose sum is σ = 117939024. Its totient is φ = 58926080.

The previous prime is 88421647. The next prime is 88421699. The reversal of 88421691 is 19612488.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 88421691 - 2¹⁰ = 88420667 is a prime.

It is not an unprimeable number, because it can be changed into a prime (88421699) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13531 + ... + 18971.

It is an arithmetic number, because the mean of its divisors is an integer number (14742378).

Almost surely, 2^88421691 is an apocalyptic number.

88421691 is a deficient number, since it is larger than the sum of its proper divisors (29517333).

88421691 is a wasteful number, since it uses less digits than its factorization.

88421691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10861.

The product of its digits is 27648, while the sum is 39.

The square root of 88421691 is about 9403.2808636135. The cubic root of 88421691 is about 445.5053653491.

The spelling of 88421691 in words is "eighty-eight million, four hundred twenty-one thousand, six hundred ninety-one".