981961492 has 6 divisors (see below), whose sum is σ = 1718432618. Its totient is φ = 490980744.

The previous prime is 981961483. The next prime is 981961493. The reversal of 981961492 is 294169189.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 934158096 + 47803396 = 30564^2 + 6914^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (981961493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122745183 + ... + 122745190.

Almost surely, 2^981961492 is an apocalyptic number.

It is an amenable number.

981961492 is a deficient number, since it is larger than the sum of its proper divisors (736471126).

981961492 is a wasteful number, since it uses less digits than its factorization.

981961492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245490377 (or 245490375 counting only the distinct ones).

The product of its digits is 279936, while the sum is 49.

The square root of 981961492 is about 31336.2648061316. The cubic root of 981961492 is about 993.9506430723.

The spelling of 981961492 in words is "nine hundred eighty-one million, nine hundred sixty-one thousand, four hundred ninety-two".