2781474457 has 2 divisors, whose sum is σ = 2781474458. Its totient is φ = 2781474456.

The previous prime is 2781474427. The next prime is 2781474469. The reversal of 2781474457 is 7544741872.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2760871936 + 20602521 = 52544^2 + 4539^2 .

It is a cyclic number.

It is not a de Polignac number, because 2781474457 - 2¹⁹ = 2780950169 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2781474457.

It is not a weakly prime, because it can be changed into another prime (2781474407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1390737228 + 1390737229.

It is an arithmetic number, because the mean of its divisors is an integer number (1390737229).

Almost surely, 2^2781474457 is an apocalyptic number.

It is an amenable number.

2781474457 is a deficient number, since it is larger than the sum of its proper divisors (1).

2781474457 is an equidigital number, since it uses as much as digits as its factorization.

2781474457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1756160, while the sum is 49.

The square root of 2781474457 is about 52739.6857878391. The cubic root of 2781474457 is about 1406.3444124214.

The spelling of 2781474457 in words is "two billion, seven hundred eighty-one million, four hundred seventy-four thousand, four hundred fifty-seven".