198977242 has 16 divisors (see below), whose sum is σ = 303835464. Its totient is φ = 97704000.

The previous prime is 198977227. The next prime is 198977257. The reversal of 198977242 is 242779891.

It is an interprime number because it is at equal distance from previous prime (198977227) and next prime (198977257).

It can be written as a sum of positive squares in 4 ways, for example, as 158030041 + 40947201 = 12571^2 + 6399^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 143392 + ... + 144772.

Almost surely, 2^198977242 is an apocalyptic number.

198977242 is a deficient number, since it is larger than the sum of its proper divisors (104858222).

198977242 is a wasteful number, since it uses less digits than its factorization.

198977242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2625.

The product of its digits is 508032, while the sum is 49.

The square root of 198977242 is about 14105.9293206793. The cubic root of 198977242 is about 583.8049893863.

The spelling of 198977242 in words is "one hundred ninety-eight million, nine hundred seventy-seven thousand, two hundred forty-two".