190697021 has 8 divisors (see below), whose sum is σ = 194538240. Its totient is φ = 186864912.

The previous prime is 190696993. The next prime is 190697029. The reversal of 190697021 is 120796091.

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-190697021 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 (190697029) 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, 53336 + ... + 56798.

It is an arithmetic number, because the mean of its divisors is an integer number (24317280).

Almost surely, 2^190697021 is an apocalyptic number.

It is an amenable number.

190697021 is a deficient number, since it is larger than the sum of its proper divisors (3841219).

190697021 is a wasteful number, since it uses less digits than its factorization.

190697021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4555.

The product of its (nonzero) digits is 6804, while the sum is 35.

The square root of 190697021 is about 13809.3092151635. The cubic root of 190697021 is about 575.5918503319.

The spelling of 190697021 in words is "one hundred ninety million, six hundred ninety-seven thousand, twenty-one".