88135921 has 4 divisors (see below), whose sum is σ = 89377344. Its totient is φ = 86894500.

The previous prime is 88135919. The next prime is 88135963. The reversal of 88135921 is 12953188.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 88135921 - 2¹ = 88135919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (88135991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 620605 + ... + 620746.

It is an arithmetic number, because the mean of its divisors is an integer number (22344336).

Almost surely, 2^88135921 is an apocalyptic number.

It is an amenable number.

88135921 is a deficient number, since it is larger than the sum of its proper divisors (1241423).

88135921 is a wasteful number, since it uses less digits than its factorization.

88135921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1241422.

The product of its digits is 17280, while the sum is 37.

The square root of 88135921 is about 9388.0733380178. The cubic root of 88135921 is about 445.0249045524.

The spelling of 88135921 in words is "eighty-eight million, one hundred thirty-five thousand, nine hundred twenty-one".