189941749 has 2 divisors, whose sum is σ = 189941750. Its totient is φ = 189941748.

The previous prime is 189941737. The next prime is 189941767. The reversal of 189941749 is 947149981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 133240849 + 56700900 = 11543^2 + 7530^2 .

It is a cyclic number.

It is not a de Polignac number, because 189941749 - 2¹⁵ = 189908981 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 189941696 and 189941705.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189941729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94970874 + 94970875.

It is an arithmetic number, because the mean of its divisors is an integer number (94970875).

Almost surely, 2^189941749 is an apocalyptic number.

It is an amenable number.

189941749 is a deficient number, since it is larger than the sum of its proper divisors (1).

189941749 is an equidigital number, since it uses as much as digits as its factorization.

189941749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 653184, while the sum is 52.

The square root of 189941749 is about 13781.9356042611. The cubic root of 189941749 is about 574.8309511870.

The spelling of 189941749 in words is "one hundred eighty-nine million, nine hundred forty-one thousand, seven hundred forty-nine".