194021351 has 2 divisors, whose sum is σ = 194021352. Its totient is φ = 194021350.

The previous prime is 194021327. The next prime is 194021363. The reversal of 194021351 is 153120491.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 194021351 - 2²² = 189827047 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 194021351.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (194021251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97010675 + 97010676.

It is an arithmetic number, because the mean of its divisors is an integer number (97010676).

Almost surely, 2^194021351 is an apocalyptic number.

194021351 is a deficient number, since it is larger than the sum of its proper divisors (1).

194021351 is an equidigital number, since it uses as much as digits as its factorization.

194021351 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 194021351 is about 13929.1547123291. The cubic root of 194021351 is about 578.9172735566.

The spelling of 194021351 in words is "one hundred ninety-four million, twenty-one thousand, three hundred fifty-one".