30494981 has 16 divisors (see below), whose sum is σ = 35691840. Its totient is φ = 25758720.

The previous prime is 30494969. The next prime is 30495001. The reversal of 30494981 is 18949403.

It is a cyclic number.

It is not a de Polignac number, because 30494981 - 2¹⁸ = 30232837 is a prime.

It is a super-2 number, since 2×30494981² = 1859887732380722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30494951) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9701 + ... + 12453.

It is an arithmetic number, because the mean of its divisors is an integer number (2230740).

Almost surely, 2^30494981 is an apocalyptic number.

It is an amenable number.

30494981 is a deficient number, since it is larger than the sum of its proper divisors (5196859).

30494981 is a wasteful number, since it uses less digits than its factorization.

30494981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2836.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 30494981 is about 5522.2260909890. The cubic root of 30494981 is about 312.4228494345.

The spelling of 30494981 in words is "thirty million, four hundred ninety-four thousand, nine hundred eighty-one".