30981098 has 4 divisors (see below), whose sum is σ = 46471650. Its totient is φ = 15490548.

The previous prime is 30981073. The next prime is 30981103. The reversal of 30981098 is 89018903.

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

It can be written as a sum of positive squares in only one way, i.e., 27321529 + 3659569 = 5227^2 + 1913^2 .

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7745273 + ... + 7745276.

Almost surely, 2^30981098 is an apocalyptic number.

30981098 is a deficient number, since it is larger than the sum of its proper divisors (15490552).

30981098 is a wasteful number, since it uses less digits than its factorization.

30981098 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15490551.

The product of its (nonzero) digits is 15552, while the sum is 38.

The square root of 30981098 is about 5566.0666542901. The cubic root of 30981098 is about 314.0742045406.

The spelling of 30981098 in words is "thirty million, nine hundred eighty-one thousand, ninety-eight".