190154197 has 6 divisors (see below), whose sum is σ = 201998018. Its totient is φ = 178968384.

The previous prime is 190154143. The next prime is 190154201. The reversal of 190154197 is 791451091.

It can be written as a sum of positive squares in 3 ways, for example, as 131079601 + 59074596 = 11449^2 + 7686^2 .

It is a de Polignac number, because none of the positive numbers 2^k-190154197 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 (190151197) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 328698 + ... + 329275.

Almost surely, 2^190154197 is an apocalyptic number.

190154197 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

190154197 is a deficient number, since it is larger than the sum of its proper divisors (11843821).

190154197 is an equidigital number, since it uses as much as digits as its factorization.

190154197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 658007 (or 657990 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 37.

The square root of 190154197 is about 13789.6409307857. The cubic root of 190154197 is about 575.0451856110.

The spelling of 190154197 in words is "one hundred ninety million, one hundred fifty-four thousand, one hundred ninety-seven".