30407681 has 2 divisors, whose sum is σ = 30407682. Its totient is φ = 30407680.

The previous prime is 30407669. The next prime is 30407687. The reversal of 30407681 is 18670403.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21160000 + 9247681 = 4600^2 + 3041^2 .

It is a cyclic number.

It is not a de Polignac number, because 30407681 - 2⁶ = 30407617 is a prime.

It is a super-2 number, since 2×30407681² = 1849254127595522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (30407687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15203840 + 15203841.

It is an arithmetic number, because the mean of its divisors is an integer number (15203841).

Almost surely, 2^30407681 is an apocalyptic number.

It is an amenable number.

30407681 is a deficient number, since it is larger than the sum of its proper divisors (1).

30407681 is an equidigital number, since it uses as much as digits as its factorization.

30407681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 30407681 is about 5514.3160047281. The cubic root of 30407681 is about 312.1244332997.

The spelling of 30407681 in words is "thirty million, four hundred seven thousand, six hundred eighty-one".