77583109 has 2 divisors, whose sum is σ = 77583110. Its totient is φ = 77583108.

The previous prime is 77583101. The next prime is 77583113. The reversal of 77583109 is 90138577.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48692484 + 28890625 = 6978^2 + 5375^2 .

It is a cyclic number.

It is not a de Polignac number, because 77583109 - 2³ = 77583101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77583101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38791554 + 38791555.

It is an arithmetic number, because the mean of its divisors is an integer number (38791555).

Almost surely, 2^77583109 is an apocalyptic number.

It is an amenable number.

77583109 is a deficient number, since it is larger than the sum of its proper divisors (1).

77583109 is an equidigital number, since it uses as much as digits as its factorization.

77583109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52920, while the sum is 40.

The square root of 77583109 is about 8808.1274400408. The cubic root of 77583109 is about 426.5032973041.

The spelling of 77583109 in words is "seventy-seven million, five hundred eighty-three thousand, one hundred nine".