73931789 has 2 divisors, whose sum is σ = 73931790. Its totient is φ = 73931788.

The previous prime is 73931773. The next prime is 73931797. The reversal of 73931789 is 98713937.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47748100 + 26183689 = 6910^2 + 5117^2 .

It is a cyclic number.

It is not a de Polignac number, because 73931789 - 2⁴ = 73931773 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73931989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36965894 + 36965895.

It is an arithmetic number, because the mean of its divisors is an integer number (36965895).

Almost surely, 2^73931789 is an apocalyptic number.

It is an amenable number.

73931789 is a deficient number, since it is larger than the sum of its proper divisors (1).

73931789 is an equidigital number, since it uses as much as digits as its factorization.

73931789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 285768, while the sum is 47.

The square root of 73931789 is about 8598.3596691462. The cubic root of 73931789 is about 419.7046090012.

The spelling of 73931789 in words is "seventy-three million, nine hundred thirty-one thousand, seven hundred eighty-nine".