30740639 has 2 divisors, whose sum is σ = 30740640. Its totient is φ = 30740638.

The previous prime is 30740617. The next prime is 30740707. The reversal of 30740639 is 93604703.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 30740639 - 2²⁰ = 29692063 is a prime.

It is a super-2 number, since 2×30740639² = 1889973772256642, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30740839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15370319 + 15370320.

It is an arithmetic number, because the mean of its divisors is an integer number (15370320).

Almost surely, 2^30740639 is an apocalyptic number.

30740639 is a deficient number, since it is larger than the sum of its proper divisors (1).

30740639 is an equidigital number, since it uses as much as digits as its factorization.

30740639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 32.

The square root of 30740639 is about 5544.4241360127. The cubic root of 30740639 is about 313.2595335724.

The spelling of 30740639 in words is "thirty million, seven hundred forty thousand, six hundred thirty-nine".