30539749 has 2 divisors, whose sum is σ = 30539750. Its totient is φ = 30539748.

The previous prime is 30539737. The next prime is 30539777. The reversal of 30539749 is 94793503.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28037025 + 2502724 = 5295^2 + 1582^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30539749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30539449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15269874 + 15269875.

It is an arithmetic number, because the mean of its divisors is an integer number (15269875).

Almost surely, 2^30539749 is an apocalyptic number.

It is an amenable number.

30539749 is a deficient number, since it is larger than the sum of its proper divisors (1).

30539749 is an equidigital number, since it uses as much as digits as its factorization.

30539749 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 102060, while the sum is 40.

The square root of 30539749 is about 5526.2780422270. The cubic root of 30539749 is about 312.5756582678.

The spelling of 30539749 in words is "thirty million, five hundred thirty-nine thousand, seven hundred forty-nine".