30777161 has 4 divisors (see below), whose sum is σ = 30799824. Its totient is φ = 30754500.

The previous prime is 30777139. The next prime is 30777211. The reversal of 30777161 is 16177703.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16177703 = 251 ⋅64453.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30777161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30777661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9155 + ... + 12056.

It is an arithmetic number, because the mean of its divisors is an integer number (7699956).

Almost surely, 2^30777161 is an apocalyptic number.

It is an amenable number.

30777161 is a deficient number, since it is larger than the sum of its proper divisors (22663).

30777161 is a wasteful number, since it uses less digits than its factorization.

30777161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22662.

The product of its (nonzero) digits is 6174, while the sum is 32.

The square root of 30777161 is about 5547.7167375417. The cubic root of 30777161 is about 313.3835424544.

The spelling of 30777161 in words is "thirty million, seven hundred seventy-seven thousand, one hundred sixty-one".