74781229 has 2 divisors, whose sum is σ = 74781230. Its totient is φ = 74781228.

The previous prime is 74781221. The next prime is 74781241. The reversal of 74781229 is 92218747.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73925604 + 855625 = 8598^2 + 925^2 .

It is a cyclic number.

It is not a de Polignac number, because 74781229 - 2³ = 74781221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 74781191 and 74781200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74781221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37390614 + 37390615.

It is an arithmetic number, because the mean of its divisors is an integer number (37390615).

Almost surely, 2^74781229 is an apocalyptic number.

It is an amenable number.

74781229 is a deficient number, since it is larger than the sum of its proper divisors (1).

74781229 is an equidigital number, since it uses as much as digits as its factorization.

74781229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56448, while the sum is 40.

The square root of 74781229 is about 8647.6140640063. The cubic root of 74781229 is about 421.3058919637.

The spelling of 74781229 in words is "seventy-four million, seven hundred eighty-one thousand, two hundred twenty-nine".