189959983 has 2 divisors, whose sum is σ = 189959984. Its totient is φ = 189959982.

The previous prime is 189959969. The next prime is 189959993. The reversal of 189959983 is 389959981.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (389959981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 189959983 - 2¹³ = 189951791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189959993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94979991 + 94979992.

It is an arithmetic number, because the mean of its divisors is an integer number (94979992).

Almost surely, 2^189959983 is an apocalyptic number.

189959983 is a deficient number, since it is larger than the sum of its proper divisors (1).

189959983 is an equidigital number, since it uses as much as digits as its factorization.

189959983 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6298560, while the sum is 61.

The square root of 189959983 is about 13782.5971064963. The cubic root of 189959983 is about 574.8493447774.

The spelling of 189959983 in words is "one hundred eighty-nine million, nine hundred fifty-nine thousand, nine hundred eighty-three".