189896949 has 12 divisors (see below), whose sum is σ = 299231712. Its totient is φ = 115089000.

The previous prime is 189896939. The next prime is 189896957. The reversal of 189896949 is 949698981.

It is not a de Polignac number, because 189896949 - 2⁷ = 189896821 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189896909) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 958977 + ... + 959174.

It is an arithmetic number, because the mean of its divisors is an integer number (24935976).

Almost surely, 2^189896949 is an apocalyptic number.

It is an amenable number.

189896949 is a deficient number, since it is larger than the sum of its proper divisors (109334763).

189896949 is a wasteful number, since it uses less digits than its factorization.

189896949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1918168 (or 1918165 counting only the distinct ones).

The product of its digits is 10077696, while the sum is 63.

The square root of 189896949 is about 13780.3101924449. The cubic root of 189896949 is about 574.7857540820.

The spelling of 189896949 in words is "one hundred eighty-nine million, eight hundred ninety-six thousand, nine hundred forty-nine".