30139777 has 2 divisors, whose sum is σ = 30139778. Its totient is φ = 30139776.

The previous prime is 30139771. The next prime is 30139799. The reversal of 30139777 is 77793103.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29931841 + 207936 = 5471^2 + 456^2 .

It is a cyclic number.

It is not a de Polignac number, because 30139777 - 2⁷ = 30139649 is a prime.

It is not a weakly prime, because it can be changed into another prime (30139771) 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, 15069888 + 15069889.

It is an arithmetic number, because the mean of its divisors is an integer number (15069889).

Almost surely, 2^30139777 is an apocalyptic number.

It is an amenable number.

30139777 is a deficient number, since it is larger than the sum of its proper divisors (1).

30139777 is an equidigital number, since it uses as much as digits as its factorization.

30139777 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27783, while the sum is 37.

The square root of 30139777 is about 5489.9705827991. The cubic root of 30139777 is about 311.2050804247.

The spelling of 30139777 in words is "thirty million, one hundred thirty-nine thousand, seven hundred seventy-seven".