189542407 has 2 divisors, whose sum is σ = 189542408. Its totient is φ = 189542406.

The previous prime is 189542359. The next prime is 189542413. The reversal of 189542407 is 704245981.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189542407 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 189542407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189542417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94771203 + 94771204.

It is an arithmetic number, because the mean of its divisors is an integer number (94771204).

Almost surely, 2^189542407 is an apocalyptic number.

189542407 is a deficient number, since it is larger than the sum of its proper divisors (1).

189542407 is an equidigital number, since it uses as much as digits as its factorization.

189542407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 189542407 is about 13767.4401033743. The cubic root of 189542407 is about 574.4278184616.

The spelling of 189542407 in words is "one hundred eighty-nine million, five hundred forty-two thousand, four hundred seven".