77494045 has 4 divisors (see below), whose sum is σ = 92992860. Its totient is φ = 61995232.

The previous prime is 77494033. The next prime is 77494049. The reversal of 77494045 is 54049477.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 42954916 + 34539129 = 6554^2 + 5877^2 .

It is a cyclic number.

It is not a de Polignac number, because 77494045 - 2⁵ = 77494013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 77493989 and 77494007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77494049) 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, 7749400 + ... + 7749409.

It is an arithmetic number, because the mean of its divisors is an integer number (23248215).

Almost surely, 2^77494045 is an apocalyptic number.

It is an amenable number.

77494045 is a deficient number, since it is larger than the sum of its proper divisors (15498815).

77494045 is a wasteful number, since it uses less digits than its factorization.

77494045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15498814.

The product of its (nonzero) digits is 141120, while the sum is 40.

The square root of 77494045 is about 8803.0702030598. The cubic root of 77494045 is about 426.3400287988.

The spelling of 77494045 in words is "seventy-seven million, four hundred ninety-four thousand, forty-five".