190681157 has 2 divisors, whose sum is σ = 190681158. Its totient is φ = 190681156.

The previous prime is 190681081. The next prime is 190681171. The reversal of 190681157 is 751186091.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 158407396 + 32273761 = 12586^2 + 5681^2 .

It is an emirp because it is prime and its reverse (751186091) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 190681157 - 2⁸ = 190680901 is a prime.

It is a Chen prime.

It is a pancake number, because a pancake can be divided into 190681157 parts by 19528 straight cuts.

It is a self number, because there is not a number n which added to its sum of digits gives 190681157.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (190681957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95340578 + 95340579.

It is an arithmetic number, because the mean of its divisors is an integer number (95340579).

Almost surely, 2^190681157 is an apocalyptic number.

It is an amenable number.

190681157 is a deficient number, since it is larger than the sum of its proper divisors (1).

190681157 is an equidigital number, since it uses as much as digits as its factorization.

190681157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 38.

The square root of 190681157 is about 13808.7348080843. The cubic root of 190681157 is about 575.5758888129.

The spelling of 190681157 in words is "one hundred ninety million, six hundred eighty-one thousand, one hundred fifty-seven".