1371001391 has 2 divisors, whose sum is σ = 1371001392. Its totient is φ = 1371001390.

The previous prime is 1371001343. The next prime is 1371001433. The reversal of 1371001391 is 1931001731.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1371001391 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1371001391.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1371006391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 685500695 + 685500696.

It is an arithmetic number, because the mean of its divisors is an integer number (685500696).

Almost surely, 2^1371001391 is an apocalyptic number.

1371001391 is a deficient number, since it is larger than the sum of its proper divisors (1).

1371001391 is an equidigital number, since it uses as much as digits as its factorization.

1371001391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 567, while the sum is 26.

The square root of 1371001391 is about 37027.0359467241. The cubic root of 1371001391 is about 1110.9110803018.

The spelling of 1371001391 in words is "one billion, three hundred seventy-one million, one thousand, three hundred ninety-one".