30749399 has 2 divisors, whose sum is σ = 30749400. Its totient is φ = 30749398.

The previous prime is 30749393. The next prime is 30749423. The reversal of 30749399 is 99394703.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (99394703) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30749399 - 2⁸ = 30749143 is a prime.

It is a super-2 number, since 2×30749399² = 1891051077722402, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30749393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15374699 + 15374700.

It is an arithmetic number, because the mean of its divisors is an integer number (15374700).

Almost surely, 2^30749399 is an apocalyptic number.

30749399 is a deficient number, since it is larger than the sum of its proper divisors (1).

30749399 is an equidigital number, since it uses as much as digits as its factorization.

30749399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 183708, while the sum is 44.

The square root of 30749399 is about 5545.2140625949. The cubic root of 30749399 is about 313.2892867263.

The spelling of 30749399 in words is "thirty million, seven hundred forty-nine thousand, three hundred ninety-nine".