1373860381 has 2 divisors, whose sum is σ = 1373860382. Its totient is φ = 1373860380.

The previous prime is 1373860343. The next prime is 1373860421. The reversal of 1373860381 is 1830683731.

It is an a-pointer prime, because the next prime (1373860421) can be obtained adding 1373860381 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 857025625 + 516834756 = 29275^2 + 22734^2 .

It is a cyclic number.

It is not a de Polignac number, because 1373860381 - 2²¹ = 1371763229 is a prime.

It is a super-2 number, since 2×1373860381² = 3774984692962930322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1373864381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 686930190 + 686930191.

It is an arithmetic number, because the mean of its divisors is an integer number (686930191).

Almost surely, 2^1373860381 is an apocalyptic number.

It is an amenable number.

1373860381 is a deficient number, since it is larger than the sum of its proper divisors (1).

1373860381 is an equidigital number, since it uses as much as digits as its factorization.

1373860381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 1373860381 is about 37065.6226306803. The cubic root of 1373860381 is about 1111.6827494669.

The spelling of 1373860381 in words is "one billion, three hundred seventy-three million, eight hundred sixty thousand, three hundred eighty-one".