1085151391 has 2 divisors, whose sum is σ = 1085151392. Its totient is φ = 1085151390.

The previous prime is 1085151359. The next prime is 1085151401. The reversal of 1085151391 is 1931515801.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1085151391 - 2⁵ = 1085151359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1085151491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 542575695 + 542575696.

It is an arithmetic number, because the mean of its divisors is an integer number (542575696).

Almost surely, 2^1085151391 is an apocalyptic number.

1085151391 is a deficient number, since it is larger than the sum of its proper divisors (1).

1085151391 is an equidigital number, since it uses as much as digits as its factorization.

1085151391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5400, while the sum is 34.

The square root of 1085151391 is about 32941.6361311942. The cubic root of 1085151391 is about 1027.6142321440.

The spelling of 1085151391 in words is "one billion, eighty-five million, one hundred fifty-one thousand, three hundred ninety-one".