1373805401 has 2 divisors, whose sum is σ = 1373805402. Its totient is φ = 1373805400.

The previous prime is 1373805359. The next prime is 1373805403. The reversal of 1373805401 is 1045083731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1238688025 + 135117376 = 35195^2 + 11624^2 .

It is an emirp because it is prime and its reverse (1045083731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1373805401 - 2⁶ = 1373805337 is a prime.

Together with 1373805403, 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 (1373805403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 686902700 + 686902701.

It is an arithmetic number, because the mean of its divisors is an integer number (686902701).

Almost surely, 2^1373805401 is an apocalyptic number.

It is an amenable number.

1373805401 is a deficient number, since it is larger than the sum of its proper divisors (1).

1373805401 is an equidigital number, since it uses as much as digits as its factorization.

1373805401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 1373805401 is about 37064.8809656796. The cubic root of 1373805401 is about 1111.6679199317.

The spelling of 1373805401 in words is "one billion, three hundred seventy-three million, eight hundred five thousand, four hundred one".