88070921 has 4 divisors (see below), whose sum is σ = 88131792. Its totient is φ = 88010052.

The previous prime is 88070849. The next prime is 88070959. The reversal of 88070921 is 12907088.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-88070921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (88070821) 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, 28211 + ... + 31176.

It is an arithmetic number, because the mean of its divisors is an integer number (22032948).

Almost surely, 2^88070921 is an apocalyptic number.

It is an amenable number.

88070921 is a deficient number, since it is larger than the sum of its proper divisors (60871).

88070921 is a wasteful number, since it uses less digits than its factorization.

88070921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60870.

The product of its (nonzero) digits is 8064, while the sum is 35.

The square root of 88070921 is about 9384.6108603394. The cubic root of 88070921 is about 444.9154760981.

The spelling of 88070921 in words is "eighty-eight million, seventy thousand, nine hundred twenty-one".