189790357 has 2 divisors, whose sum is σ = 189790358. Its totient is φ = 189790356.

The previous prime is 189790351. The next prime is 189790399. The reversal of 189790357 is 753097981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 163175076 + 26615281 = 12774^2 + 5159^2 .

It is an emirp because it is prime and its reverse (753097981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 189790357 - 2⁷ = 189790229 is a prime.

It is a super-2 number, since 2×189790357² = 72040759220374898, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 189790357.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189790351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94895178 + 94895179.

It is an arithmetic number, because the mean of its divisors is an integer number (94895179).

Almost surely, 2^189790357 is an apocalyptic number.

It is an amenable number.

189790357 is a deficient number, since it is larger than the sum of its proper divisors (1).

189790357 is an equidigital number, since it uses as much as digits as its factorization.

189790357 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 476280, while the sum is 49.

The square root of 189790357 is about 13776.4421023717. The cubic root of 189790357 is about 574.6781886709.

The spelling of 189790357 in words is "one hundred eighty-nine million, seven hundred ninety thousand, three hundred fifty-seven".