77749107 has 4 divisors (see below), whose sum is σ = 103665480. Its totient is φ = 51832736.

The previous prime is 77749103. The next prime is 77749129. The reversal of 77749107 is 70194777.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70194777 = 3 ⋅23398259.

It is a cyclic number.

It is not a de Polignac number, because 77749107 - 2² = 77749103 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77749103) 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, 12958182 + ... + 12958187.

It is an arithmetic number, because the mean of its divisors is an integer number (25916370).

Almost surely, 2^77749107 is an apocalyptic number.

77749107 is a deficient number, since it is larger than the sum of its proper divisors (25916373).

77749107 is a wasteful number, since it uses less digits than its factorization.

77749107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25916372.

The product of its (nonzero) digits is 86436, while the sum is 42.

The square root of 77749107 is about 8817.5454067444. The cubic root of 77749107 is about 426.8072649297.

The spelling of 77749107 in words is "seventy-seven million, seven hundred forty-nine thousand, one hundred seven".