30749977 has 2 divisors, whose sum is σ = 30749978. Its totient is φ = 30749976.

The previous prime is 30749963. The next prime is 30749987. The reversal of 30749977 is 77994703.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28472896 + 2277081 = 5336^2 + 1509^2 .

It is a cyclic number.

It is not a de Polignac number, because 30749977 - 2¹¹ = 30747929 is a prime.

It is a super-2 number, since 2×30749977² = 1891122171001058, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (30749987) 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, 15374988 + 15374989.

It is an arithmetic number, because the mean of its divisors is an integer number (15374989).

Almost surely, 2^30749977 is an apocalyptic number.

It is an amenable number.

30749977 is a deficient number, since it is larger than the sum of its proper divisors (1).

30749977 is an equidigital number, since it uses as much as digits as its factorization.

30749977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 333396, while the sum is 46.

The square root of 30749977 is about 5545.2661793642. The cubic root of 30749977 is about 313.2912496923.

The spelling of 30749977 in words is "thirty million, seven hundred forty-nine thousand, nine hundred seventy-seven".