1373677649 has 2 divisors, whose sum is σ = 1373677650. Its totient is φ = 1373677648.

The previous prime is 1373677633. The next prime is 1373677681. The reversal of 1373677649 is 9467763731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1106028049 + 267649600 = 33257^2 + 16360^2 .

It is a cyclic number.

It is not a de Polignac number, because 1373677649 - 2⁴ = 1373677633 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1373677649.

It is not a weakly prime, because it can be changed into another prime (1373674649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 686838824 + 686838825.

It is an arithmetic number, because the mean of its divisors is an integer number (686838825).

Almost surely, 2^1373677649 is an apocalyptic number.

It is an amenable number.

1373677649 is a deficient number, since it is larger than the sum of its proper divisors (1).

1373677649 is an equidigital number, since it uses as much as digits as its factorization.

1373677649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4000752, while the sum is 53.

The square root of 1373677649 is about 37063.1575692088. The cubic root of 1373677649 is about 1111.6334603684.

The spelling of 1373677649 in words is "one billion, three hundred seventy-three million, six hundred seventy-seven thousand, six hundred forty-nine".