198926139 has 8 divisors (see below), whose sum is σ = 265581072. Its totient is φ = 132444320.

The previous prime is 198926131. The next prime is 198926177. The reversal of 198926139 is 931629891.

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

It is a cyclic number.

It is not a de Polignac number, because 198926139 - 2³ = 198926131 is a prime.

It is not an unprimeable number, because it can be changed into a prime (198926131) 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, 40572 + ... + 45209.

It is an arithmetic number, because the mean of its divisors is an integer number (33197634).

Almost surely, 2^198926139 is an apocalyptic number.

198926139 is a deficient number, since it is larger than the sum of its proper divisors (66654933).

198926139 is an equidigital number, since it uses as much as digits as its factorization.

198926139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86557.

The product of its digits is 209952, while the sum is 48.

The square root of 198926139 is about 14104.1178029680. The cubic root of 198926139 is about 583.7550058797.

The spelling of 198926139 in words is "one hundred ninety-eight million, nine hundred twenty-six thousand, one hundred thirty-nine".