1373860421 has 2 divisors, whose sum is σ = 1373860422. Its totient is φ = 1373860420.

The previous prime is 1373860381. The next prime is 1373860447. The reversal of 1373860421 is 1240683731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1335902500 + 37957921 = 36550^2 + 6161^2 .

It is a cyclic number.

It is not a de Polignac number, because 1373860421 - 2²² = 1369666117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1373860451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 686930210 + 686930211.

It is an arithmetic number, because the mean of its divisors is an integer number (686930211).

Almost surely, 2^1373860421 is an apocalyptic number.

It is an amenable number.

1373860421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1373860421 is an equidigital number, since it uses as much as digits as its factorization.

1373860421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 1373860421 is about 37065.6231702638. The cubic root of 1373860421 is about 1111.6827602558.

The spelling of 1373860421 in words is "one billion, three hundred seventy-three million, eight hundred sixty thousand, four hundred twenty-one".