30290639 has 2 divisors, whose sum is σ = 30290640. Its totient is φ = 30290638.

The previous prime is 30290629. The next prime is 30290641. The reversal of 30290639 is 93609203.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30290639 is a prime.

It is a super-2 number, since 2×30290639² = 1835045622056642, which contains 22 as substring.

Together with 30290641, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30290629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15145319 + 15145320.

It is an arithmetic number, because the mean of its divisors is an integer number (15145320).

Almost surely, 2^30290639 is an apocalyptic number.

30290639 is a deficient number, since it is larger than the sum of its proper divisors (1).

30290639 is an equidigital number, since it uses as much as digits as its factorization.

30290639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8748, while the sum is 32.

The square root of 30290639 is about 5503.6932145606. The cubic root of 30290639 is about 311.7234530378.

The spelling of 30290639 in words is "thirty million, two hundred ninety thousand, six hundred thirty-nine".