77474506 has 4 divisors (see below), whose sum is σ = 116211762. Its totient is φ = 38737252.

The previous prime is 77474503. The next prime is 77474513. The reversal of 77474506 is 60547477.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60547477 = 23 ⋅2632499.

It can be written as a sum of positive squares in only one way, i.e., 65853225 + 11621281 = 8115^2 + 3409^2 .

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 not an unprimeable number, because it can be changed into a prime (77474503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19368625 + ... + 19368628.

Almost surely, 2^77474506 is an apocalyptic number.

77474506 is a deficient number, since it is larger than the sum of its proper divisors (38737256).

77474506 is a wasteful number, since it uses less digits than its factorization.

77474506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38737255.

The product of its (nonzero) digits is 164640, while the sum is 40.

The square root of 77474506 is about 8801.9603498312. The cubic root of 77474506 is about 426.3041939677.

The spelling of 77474506 in words is "seventy-seven million, four hundred seventy-four thousand, five hundred six".