195129790 has 8 divisors (see below), whose sum is σ = 351233640. Its totient is φ = 78051912.

The previous prime is 195129773. The next prime is 195129799. The reversal of 195129790 is 97921591.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195129799) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9756480 + ... + 9756499.

It is an arithmetic number, because the mean of its divisors is an integer number (43904205).

Almost surely, 2^195129790 is an apocalyptic number.

195129790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

195129790 is a deficient number, since it is larger than the sum of its proper divisors (156103850).

195129790 is a wasteful number, since it uses less digits than its factorization.

195129790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19512986.

The product of its (nonzero) digits is 51030, while the sum is 43.

The square root of 195129790 is about 13968.8864982145. The cubic root of 195129790 is about 580.0176272883.

The spelling of 195129790 in words is "one hundred ninety-five million, one hundred twenty-nine thousand, seven hundred ninety".