274391813 has 2 divisors, whose sum is σ = 274391814. Its totient is φ = 274391812.

The previous prime is 274391809. The next prime is 274391833. The reversal of 274391813 is 318193472.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 242829889 + 31561924 = 15583^2 + 5618^2 .

It is a cyclic number.

It is not a de Polignac number, because 274391813 - 2² = 274391809 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (274391833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 137195906 + 137195907.

It is an arithmetic number, because the mean of its divisors is an integer number (137195907).

Almost surely, 2^274391813 is an apocalyptic number.

It is an amenable number.

274391813 is a deficient number, since it is larger than the sum of its proper divisors (1).

274391813 is an equidigital number, since it uses as much as digits as its factorization.

274391813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 38.

The square root of 274391813 is about 16564.7762737684. The cubic root of 274391813 is about 649.8159739395.

The spelling of 274391813 in words is "two hundred seventy-four million, three hundred ninety-one thousand, eight hundred thirteen".