190555557 has 4 divisors (see below), whose sum is σ = 254074080. Its totient is φ = 127037036.

The previous prime is 190555553. The next prime is 190555559. The reversal of 190555557 is 755555091.

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 190555557 - 2² = 190555553 is a prime.

It is a super-2 number, since 2×190555557² = 72622840607160498, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190555553) 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, 31759257 + ... + 31759262.

It is an arithmetic number, because the mean of its divisors is an integer number (63518520).

Almost surely, 2^190555557 is an apocalyptic number.

It is an amenable number.

190555557 is a deficient number, since it is larger than the sum of its proper divisors (63518523).

190555557 is an equidigital number, since it uses as much as digits as its factorization.

190555557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63518522.

The product of its (nonzero) digits is 196875, while the sum is 42.

The square root of 190555557 is about 13804.1862128848. The cubic root of 190555557 is about 575.4494854644.

The spelling of 190555557 in words is "one hundred ninety million, five hundred fifty-five thousand, five hundred fifty-seven".