1149271687 has 2 divisors, whose sum is σ = 1149271688. Its totient is φ = 1149271686.

The previous prime is 1149271667. The next prime is 1149271691. The reversal of 1149271687 is 7861729411.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (7861729411) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1149271687 - 2¹⁵ = 1149238919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1149271667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 574635843 + 574635844.

It is an arithmetic number, because the mean of its divisors is an integer number (574635844).

Almost surely, 2^1149271687 is an apocalyptic number.

1149271687 is a deficient number, since it is larger than the sum of its proper divisors (1).

1149271687 is an equidigital number, since it uses as much as digits as its factorization.

1149271687 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 169344, while the sum is 46.

The square root of 1149271687 is about 33900.9098255489. The cubic root of 1149271687 is about 1047.4683337336.

The spelling of 1149271687 in words is "one billion, one hundred forty-nine million, two hundred seventy-one thousand, six hundred eighty-seven".