70550921 has 8 divisors (see below), whose sum is σ = 80812800. Its totient is φ = 60334848.

The previous prime is 70550911. The next prime is 70550927. The reversal of 70550921 is 12905507.

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

It is a de Polignac number, because none of the positive numbers 2^k-70550921 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (70550927) 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, 8081 + ... + 14366.

It is an arithmetic number, because the mean of its divisors is an integer number (10101600).

Almost surely, 2^70550921 is an apocalyptic number.

It is an amenable number.

70550921 is a deficient number, since it is larger than the sum of its proper divisors (10261879).

70550921 is a wasteful number, since it uses less digits than its factorization.

70550921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22903.

The product of its (nonzero) digits is 3150, while the sum is 29.

The square root of 70550921 is about 8399.4595659483. The cubic root of 70550921 is about 413.2068976069.

The spelling of 70550921 in words is "seventy million, five hundred fifty thousand, nine hundred twenty-one".