83370921 has 4 divisors (see below), whose sum is σ = 111161232. Its totient is φ = 55580612.

The previous prime is 83370877. The next prime is 83370943. The reversal of 83370921 is 12907338.

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 83370921 - 2⁶ = 83370857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (83370121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13895151 + ... + 13895156.

It is an arithmetic number, because the mean of its divisors is an integer number (27790308).

Almost surely, 2^83370921 is an apocalyptic number.

It is an amenable number.

83370921 is a deficient number, since it is larger than the sum of its proper divisors (27790311).

83370921 is a wasteful number, since it uses less digits than its factorization.

83370921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27790310.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 83370921 is about 9130.7678209447. The cubic root of 83370921 is about 436.8558941995.

The spelling of 83370921 in words is "eighty-three million, three hundred seventy thousand, nine hundred twenty-one".