189951129 has 8 divisors (see below), whose sum is σ = 281409120. Its totient is φ = 126634068.

The previous prime is 189951121. The next prime is 189951137. The reversal of 189951129 is 921159981.

189951129 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (189951121) and next prime (189951137).

It is not a de Polignac number, because 189951129 - 2³ = 189951121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (189951121) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3517587 + ... + 3517640.

It is an arithmetic number, because the mean of its divisors is an integer number (35176140).

Almost surely, 2^189951129 is an apocalyptic number.

It is an amenable number.

189951129 is a deficient number, since it is larger than the sum of its proper divisors (91457991).

189951129 is an equidigital number, since it uses as much as digits as its factorization.

189951129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7035236 (or 7035230 counting only the distinct ones).

The product of its digits is 58320, while the sum is 45.

The square root of 189951129 is about 13782.2759005906. The cubic root of 189951129 is about 574.8404134311.

The spelling of 189951129 in words is "one hundred eighty-nine million, nine hundred fifty-one thousand, one hundred twenty-nine".