30139837 has 8 divisors (see below), whose sum is σ = 37095296. Its totient is φ = 23846832.

The previous prime is 30139817. The next prime is 30139849. The reversal of 30139837 is 73893103.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 30139837 - 2¹⁹ = 29615549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30139817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 165513 + ... + 165694.

It is an arithmetic number, because the mean of its divisors is an integer number (4636912).

Almost surely, 2^30139837 is an apocalyptic number.

It is an amenable number.

30139837 is a deficient number, since it is larger than the sum of its proper divisors (6955459).

30139837 is a wasteful number, since it uses less digits than its factorization.

30139837 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331227.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 30139837 is about 5489.9760473066. The cubic root of 30139837 is about 311.2052869325.

It can be divided in two parts, 30139 and 837, that added together give a square (30976 = 176²).

The spelling of 30139837 in words is "thirty million, one hundred thirty-nine thousand, eight hundred thirty-seven".