77161873 has 4 divisors (see below), whose sum is σ = 77883120. Its totient is φ = 76440628.

The previous prime is 77161871. The next prime is 77161901. The reversal of 77161873 is 37816177.

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.

It is a cyclic number.

It is not a de Polignac number, because 77161873 - 2¹ = 77161871 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77161871) 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, 360463 + ... + 360676.

It is an arithmetic number, because the mean of its divisors is an integer number (19470780).

Almost surely, 2^77161873 is an apocalyptic number.

It is an amenable number.

77161873 is a deficient number, since it is larger than the sum of its proper divisors (721247).

77161873 is a wasteful number, since it uses less digits than its factorization.

77161873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 721246.

The product of its digits is 49392, while the sum is 40.

The square root of 77161873 is about 8784.1831151223. The cubic root of 77161873 is about 425.7299989213.

The spelling of 77161873 in words is "seventy-seven million, one hundred sixty-one thousand, eight hundred seventy-three".