1591891151 has 2 divisors, whose sum is σ = 1591891152. Its totient is φ = 1591891150.

The previous prime is 1591891141. The next prime is 1591891201. The reversal of 1591891151 is 1511981951.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1591891151 - 2¹⁸ = 1591629007 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1591891099 and 1591891108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1591891121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 795945575 + 795945576.

It is an arithmetic number, because the mean of its divisors is an integer number (795945576).

Almost surely, 2^1591891151 is an apocalyptic number.

1591891151 is a deficient number, since it is larger than the sum of its proper divisors (1).

1591891151 is an equidigital number, since it uses as much as digits as its factorization.

1591891151 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16200, while the sum is 41.

The square root of 1591891151 is about 39898.5106363634. The cubic root of 1591891151 is about 1167.6278797422.

The spelling of 1591891151 in words is "one billion, five hundred ninety-one million, eight hundred ninety-one thousand, one hundred fifty-one".