30920377 has 2 divisors, whose sum is σ = 30920378. Its totient is φ = 30920376.

The previous prime is 30920347. The next prime is 30920381. The reversal of 30920377 is 77302903.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21335161 + 9585216 = 4619^2 + 3096^2 .

It is an emirp because it is prime and its reverse (77302903) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30920377 - 2⁷ = 30920249 is a prime.

It is not a weakly prime, because it can be changed into another prime (30920327) 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 as a sum of consecutive naturals, namely, 15460188 + 15460189.

It is an arithmetic number, because the mean of its divisors is an integer number (15460189).

Almost surely, 2^30920377 is an apocalyptic number.

It is an amenable number.

30920377 is a deficient number, since it is larger than the sum of its proper divisors (1).

30920377 is an equidigital number, since it uses as much as digits as its factorization.

30920377 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7938, while the sum is 31.

The square root of 30920377 is about 5560.6094090486. The cubic root of 30920377 is about 313.8688817917.

The spelling of 30920377 in words is "thirty million, nine hundred twenty thousand, three hundred seventy-seven".