189486257 has 2 divisors, whose sum is σ = 189486258. Its totient is φ = 189486256.

The previous prime is 189486247. The next prime is 189486293. The reversal of 189486257 is 752684981.

189486257 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 122965921 + 66520336 = 11089^2 + 8156^2 .

It is a cyclic number.

It is not a de Polignac number, because 189486257 - 2¹⁴ = 189469873 is a prime.

It is not a weakly prime, because it can be changed into another prime (189486247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94743128 + 94743129.

It is an arithmetic number, because the mean of its divisors is an integer number (94743129).

Almost surely, 2^189486257 is an apocalyptic number.

It is an amenable number.

189486257 is a deficient number, since it is larger than the sum of its proper divisors (1).

189486257 is an equidigital number, since it uses as much as digits as its factorization.

189486257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 967680, while the sum is 50.

The square root of 189486257 is about 13765.4007206474. The cubic root of 189486257 is about 574.3710900703.

The spelling of 189486257 in words is "one hundred eighty-nine million, four hundred eighty-six thousand, two hundred fifty-seven".