1373557673 has 2 divisors, whose sum is σ = 1373557674. Its totient is φ = 1373557672.

The previous prime is 1373557649. The next prime is 1373557793. The reversal of 1373557673 is 3767553731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1207354009 + 166203664 = 34747^2 + 12892^2 .

It is a cyclic number.

It is not a de Polignac number, because 1373557673 - 2¹⁴ = 1373541289 is a prime.

It is not a weakly prime, because it can be changed into another prime (1373557613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 686778836 + 686778837.

It is an arithmetic number, because the mean of its divisors is an integer number (686778837).

Almost surely, 2^1373557673 is an apocalyptic number.

It is an amenable number.

1373557673 is a deficient number, since it is larger than the sum of its proper divisors (1).

1373557673 is an equidigital number, since it uses as much as digits as its factorization.

1373557673 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1389150, while the sum is 47.

The square root of 1373557673 is about 37061.5389993454. The cubic root of 1373557673 is about 1111.6010963420.

The spelling of 1373557673 in words is "one billion, three hundred seventy-three million, five hundred fifty-seven thousand, six hundred seventy-three".