30139261849 has 2 divisors, whose sum is σ = 30139261850. Its totient is φ = 30139261848.

The previous prime is 30139261811. The next prime is 30139261891. The reversal of 30139261849 is 94816293103.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18253901449 + 11885360400 = 135107^2 + 109020^2 .

It is a cyclic number.

It is not a de Polignac number, because 30139261849 - 2³³ = 21549327257 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30139261799 and 30139261808.

It is not a weakly prime, because it can be changed into another prime (30139201849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15069630924 + 15069630925.

It is an arithmetic number, because the mean of its divisors is an integer number (15069630925).

Almost surely, 2^30139261849 is an apocalyptic number.

It is an amenable number.

30139261849 is a deficient number, since it is larger than the sum of its proper divisors (1).

30139261849 is an equidigital number, since it uses as much as digits as its factorization.

30139261849 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 279936, while the sum is 46.

The spelling of 30139261849 in words is "thirty billion, one hundred thirty-nine million, two hundred sixty-one thousand, eight hundred forty-nine".