1385590091 has 2 divisors, whose sum is σ = 1385590092. Its totient is φ = 1385590090.

The previous prime is 1385590069. The next prime is 1385590099. The reversal of 1385590091 is 1900955831.

It is a strong prime.

It is an emirp because it is prime and its reverse (1900955831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1385590091 - 2¹⁰ = 1385589067 is a prime.

It is not a weakly prime, because it can be changed into another prime (1385590099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 692795045 + 692795046.

It is an arithmetic number, because the mean of its divisors is an integer number (692795046).

Almost surely, 2^1385590091 is an apocalyptic number.

1385590091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1385590091 is an equidigital number, since it uses as much as digits as its factorization.

1385590091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48600, while the sum is 41.

The square root of 1385590091 is about 37223.5152961136. The cubic root of 1385590091 is about 1114.8375536028.

The spelling of 1385590091 in words is "one billion, three hundred eighty-five million, five hundred ninety thousand, ninety-one".