274457891 has 2 divisors, whose sum is σ = 274457892. Its totient is φ = 274457890.

The previous prime is 274457861. The next prime is 274457893. The reversal of 274457891 is 198754472.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-274457891 is a prime.

Together with 274457893, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (274457893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 137228945 + 137228946.

It is an arithmetic number, because the mean of its divisors is an integer number (137228946).

Almost surely, 2^274457891 is an apocalyptic number.

274457891 is a deficient number, since it is larger than the sum of its proper divisors (1).

274457891 is an equidigital number, since it uses as much as digits as its factorization.

274457891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 564480, while the sum is 47.

The square root of 274457891 is about 16566.7706871315. The cubic root of 274457891 is about 649.8681318291.

The spelling of 274457891 in words is "two hundred seventy-four million, four hundred fifty-seven thousand, eight hundred ninety-one".