274684639 has 2 divisors, whose sum is σ = 274684640. Its totient is φ = 274684638.

The previous prime is 274684609. The next prime is 274684643. The reversal of 274684639 is 936486472.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 274684639 - 2⁷ = 274684511 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 274684592 and 274684601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (274684609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 137342319 + 137342320.

It is an arithmetic number, because the mean of its divisors is an integer number (137342320).

Almost surely, 2^274684639 is an apocalyptic number.

274684639 is a deficient number, since it is larger than the sum of its proper divisors (1).

274684639 is an equidigital number, since it uses as much as digits as its factorization.

274684639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1741824, while the sum is 49.

The square root of 274684639 is about 16573.6127322923. The cubic root of 274684639 is about 650.0470490598.

The spelling of 274684639 in words is "two hundred seventy-four million, six hundred eighty-four thousand, six hundred thirty-nine".