77394147 has 4 divisors (see below), whose sum is σ = 103192200. Its totient is φ = 51596096.

The previous prime is 77394137. The next prime is 77394173. The reversal of 77394147 is 74149377.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74149377 = 3 ⋅24716459.

It is a cyclic number.

It is not a de Polignac number, because 77394147 - 2¹⁰ = 77393123 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 77394099 and 77394108.

It is not an unprimeable number, because it can be changed into a prime (77394137) 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, 12899022 + ... + 12899027.

It is an arithmetic number, because the mean of its divisors is an integer number (25798050).

Almost surely, 2^77394147 is an apocalyptic number.

77394147 is a deficient number, since it is larger than the sum of its proper divisors (25798053).

77394147 is a wasteful number, since it uses less digits than its factorization.

77394147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25798052.

The product of its digits is 148176, while the sum is 42.

The square root of 77394147 is about 8797.3943301412. The cubic root of 77394147 is about 426.1567509287.

The spelling of 77394147 in words is "seventy-seven million, three hundred ninety-four thousand, one hundred forty-seven".