77370745 has 4 divisors (see below), whose sum is σ = 92844900. Its totient is φ = 61896592.

The previous prime is 77370743. The next prime is 77370763. The reversal of 77370745 is 54707377.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54707377 = 17 ⋅3218081.

It can be written as a sum of positive squares in 2 ways, for example, as 39388176 + 37982569 = 6276^2 + 6163^2 .

It is a cyclic number.

It is not a de Polignac number, because 77370745 - 2¹ = 77370743 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 77370698 and 77370707.

It is not an unprimeable number, because it can be changed into a prime (77370743) 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, 7737070 + ... + 7737079.

It is an arithmetic number, because the mean of its divisors is an integer number (23211225).

Almost surely, 2^77370745 is an apocalyptic number.

It is an amenable number.

77370745 is a deficient number, since it is larger than the sum of its proper divisors (15474155).

77370745 is a wasteful number, since it uses less digits than its factorization.

77370745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15474154.

The product of its (nonzero) digits is 144060, while the sum is 40.

The square root of 77370745 is about 8796.0641766645. The cubic root of 77370745 is about 426.1137936508.

The spelling of 77370745 in words is "seventy-seven million, three hundred seventy thousand, seven hundred forty-five".