198970631 has 4 divisors (see below), whose sum is σ = 207621552. Its totient is φ = 190319712.

The previous prime is 198970627. The next prime is 198970633. The reversal of 198970631 is 136079891.

198970631 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 136079891 = 23 ⋅5916517.

It is a cyclic number.

It is not a de Polignac number, because 198970631 - 2² = 198970627 is a prime.

It is a super-2 number, since 2×198970631² = 79178624001076322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198970633) 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, 4325426 + ... + 4325471.

It is an arithmetic number, because the mean of its divisors is an integer number (51905388).

Almost surely, 2^198970631 is an apocalyptic number.

198970631 is a deficient number, since it is larger than the sum of its proper divisors (8650921).

198970631 is an equidigital number, since it uses as much as digits as its factorization.

198970631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8650920.

The product of its (nonzero) digits is 81648, while the sum is 44.

The square root of 198970631 is about 14105.6949846507. The cubic root of 198970631 is about 583.7985236928.

The spelling of 198970631 in words is "one hundred ninety-eight million, nine hundred seventy thousand, six hundred thirty-one".