74631991829 has 2 divisors, whose sum is σ = 74631991830. Its totient is φ = 74631991828.

The previous prime is 74631991823. The next prime is 74631991891. The reversal of 74631991829 is 92819913647.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74407291729 + 224700100 = 272777^2 + 14990^2 .

It is a cyclic number.

It is not a de Polignac number, because 74631991829 - 2²⁴ = 74615214613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74631991823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37315995914 + 37315995915.

It is an arithmetic number, because the mean of its divisors is an integer number (37315995915).

Almost surely, 2^74631991829 is an apocalyptic number.

It is an amenable number.

74631991829 is a deficient number, since it is larger than the sum of its proper divisors (1).

74631991829 is an equidigital number, since it uses as much as digits as its factorization.

74631991829 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5878656, while the sum is 59.

The spelling of 74631991829 in words is "seventy-four billion, six hundred thirty-one million, nine hundred ninety-one thousand, eight hundred twenty-nine".