190780057 has 4 divisors (see below), whose sum is σ = 205455460. Its totient is φ = 176104656.

The previous prime is 190780049. The next prime is 190780087. The reversal of 190780057 is 750087091.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 750087091 = 13 ⋅57699007.

It can be written as a sum of positive squares in 2 ways, for example, as 8503056 + 182277001 = 2916^2 + 13501^2 .

It is not a de Polignac number, because 190780057 - 2³ = 190780049 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 190779998 and 190780025.

It is not an unprimeable number, because it can be changed into a prime (190780027) 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, 7337682 + ... + 7337707.

It is an arithmetic number, because the mean of its divisors is an integer number (51363865).

Almost surely, 2^190780057 is an apocalyptic number.

It is an amenable number.

190780057 is a deficient number, since it is larger than the sum of its proper divisors (14675403).

190780057 is a wasteful number, since it uses less digits than its factorization.

190780057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14675402.

The product of its (nonzero) digits is 17640, while the sum is 37.

The square root of 190780057 is about 13812.3154105313. The cubic root of 190780057 is about 575.6753823296.

The spelling of 190780057 in words is "one hundred ninety million, seven hundred eighty thousand, fifty-seven".