189729951 has 8 divisors (see below), whose sum is σ = 261133824. Its totient is φ = 122406360.

The previous prime is 189729941. The next prime is 189729959. The reversal of 189729951 is 159927981.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 189729951 - 2¹³ = 189721759 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 189729894 and 189729903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189729959) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1019961 + ... + 1020146.

It is an arithmetic number, because the mean of its divisors is an integer number (32641728).

Almost surely, 2^189729951 is an apocalyptic number.

189729951 is a deficient number, since it is larger than the sum of its proper divisors (71403873).

189729951 is a wasteful number, since it uses less digits than its factorization.

189729951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2040141.

The product of its digits is 408240, while the sum is 51.

The square root of 189729951 is about 13774.2495621359. The cubic root of 189729951 is about 574.6172131560.

The spelling of 189729951 in words is "one hundred eighty-nine million, seven hundred twenty-nine thousand, nine hundred fifty-one".