77690133 has 6 divisors (see below), whose sum is σ = 112219094. Its totient is φ = 51793416.

The previous prime is 77690131. The next prime is 77690143. The reversal of 77690133 is 33109677.

It can be written as a sum of positive squares in only one way, i.e., 50722884 + 26967249 = 7122^2 + 5193^2 .

It is not a de Polignac number, because 77690133 - 2¹ = 77690131 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77690131) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4316110 + ... + 4316127.

Almost surely, 2^77690133 is an apocalyptic number.

It is an amenable number.

77690133 is a deficient number, since it is larger than the sum of its proper divisors (34528961).

77690133 is a wasteful number, since it uses less digits than its factorization.

77690133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8632243 (or 8632240 counting only the distinct ones).

The product of its (nonzero) digits is 23814, while the sum is 36.

The square root of 77690133 is about 8814.2006444147. The cubic root of 77690133 is about 426.6993241469.

It can be divided in two parts, 776 and 90133, that added together give a palindrome (90909).

The spelling of 77690133 in words is "seventy-seven million, six hundred ninety thousand, one hundred thirty-three".