198749426 has 4 divisors (see below), whose sum is σ = 298124142. Its totient is φ = 99374712.

The previous prime is 198749423. The next prime is 198749429. The reversal of 198749426 is 624947891.

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

It is an interprime number because it is at equal distance from previous prime (198749423) and next prime (198749429).

It can be written as a sum of positive squares in only one way, i.e., 101707225 + 97042201 = 10085^2 + 9851^2 .

It is not an unprimeable number, because it can be changed into a prime (198749423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49687355 + ... + 49687358.

Almost surely, 2^198749426 is an apocalyptic number.

198749426 is a deficient number, since it is larger than the sum of its proper divisors (99374716).

198749426 is an equidigital number, since it uses as much as digits as its factorization.

198749426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99374715.

The product of its digits is 870912, while the sum is 50.

The square root of 198749426 is about 14097.8518221749. The cubic root of 198749426 is about 583.5820980525.

The spelling of 198749426 in words is "one hundred ninety-eight million, seven hundred forty-nine thousand, four hundred twenty-six".