189659951 has 4 divisors (see below), whose sum is σ = 204249192. Its totient is φ = 175070712.

The previous prime is 189659947. The next prime is 189659963. The reversal of 189659951 is 159956981.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 189659951 - 2² = 189659947 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 189659893 and 189659902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189659941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7294601 + ... + 7294626.

It is an arithmetic number, because the mean of its divisors is an integer number (51062298).

Almost surely, 2^189659951 is an apocalyptic number.

189659951 is a deficient number, since it is larger than the sum of its proper divisors (14589241).

189659951 is a wasteful number, since it uses less digits than its factorization.

189659951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14589240.

The product of its digits is 874800, while the sum is 53.

The square root of 189659951 is about 13771.7083544490. The cubic root of 189659951 is about 574.5465369968.

The spelling of 189659951 in words is "one hundred eighty-nine million, six hundred fifty-nine thousand, nine hundred fifty-one".