190937021 has 8 divisors (see below), whose sum is σ = 208497024. Its totient is φ = 173410720.

The previous prime is 190937011. The next prime is 190937027. The reversal of 190937021 is 120739091.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-190937021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190937027) 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, 4265 + ... + 20001.

It is an arithmetic number, because the mean of its divisors is an integer number (26062128).

Almost surely, 2^190937021 is an apocalyptic number.

190937021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

190937021 is a deficient number, since it is larger than the sum of its proper divisors (17560003).

190937021 is a wasteful number, since it uses less digits than its factorization.

190937021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16851.

The product of its (nonzero) digits is 3402, while the sum is 32.

The square root of 190937021 is about 13817.9962729768. The cubic root of 190937021 is about 575.8332177313.

The spelling of 190937021 in words is "one hundred ninety million, nine hundred thirty-seven thousand, twenty-one".