192937921 has 4 divisors (see below), whose sum is σ = 210477744. Its totient is φ = 175398100.

The previous prime is 192937919. The next prime is 192937931. The reversal of 192937921 is 129739291.

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 192937921 - 2¹ = 192937919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (192937931) 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, 8769895 + ... + 8769916.

It is an arithmetic number, because the mean of its divisors is an integer number (52619436).

Almost surely, 2^192937921 is an apocalyptic number.

192937921 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

192937921 is a deficient number, since it is larger than the sum of its proper divisors (17539823).

192937921 is a wasteful number, since it uses less digits than its factorization.

192937921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17539822.

The product of its digits is 61236, while the sum is 43.

The square root of 192937921 is about 13890.2095376564. The cubic root of 192937921 is about 577.8376888469.

The spelling of 192937921 in words is "one hundred ninety-two million, nine hundred thirty-seven thousand, nine hundred twenty-one".