30636139 has 2 divisors, whose sum is σ = 30636140. Its totient is φ = 30636138.

The previous prime is 30636131. The next prime is 30636149. The reversal of 30636139 is 93163603.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 30636139 - 2³ = 30636131 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30636139.

It is not a weakly prime, because it can be changed into another prime (30636131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15318069 + 15318070.

It is an arithmetic number, because the mean of its divisors is an integer number (15318070).

Almost surely, 2^30636139 is an apocalyptic number.

30636139 is a deficient number, since it is larger than the sum of its proper divisors (1).

30636139 is an equidigital number, since it uses as much as digits as its factorization.

30636139 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 31.

The square root of 30636139 is about 5534.9922312502. The cubic root of 30636139 is about 312.9041648438.

The spelling of 30636139 in words is "thirty million, six hundred thirty-six thousand, one hundred thirty-nine".