190857941 has 2 divisors, whose sum is σ = 190857942. Its totient is φ = 190857940.

The previous prime is 190857923. The next prime is 190857943. The reversal of 190857941 is 149758091.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 188265841 + 2592100 = 13721^2 + 1610^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-190857941 is a prime.

Together with 190857943, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 190857892 and 190857901.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (190857943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95428970 + 95428971.

It is an arithmetic number, because the mean of its divisors is an integer number (95428971).

Almost surely, 2^190857941 is an apocalyptic number.

190857941 is the 7385-th centered heptagonal number.

It is an amenable number.

190857941 is a deficient number, since it is larger than the sum of its proper divisors (1).

190857941 is an equidigital number, since it uses as much as digits as its factorization.

190857941 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 44.

The square root of 190857941 is about 13815.1344908401. The cubic root of 190857941 is about 575.7537095271.

The spelling of 190857941 in words is "one hundred ninety million, eight hundred fifty-seven thousand, nine hundred forty-one".