1291081883 has 8 divisors (see below), whose sum is σ = 1589023968. Its totient is φ = 1021515264.

The previous prime is 1291081877. The next prime is 1291081919. The reversal of 1291081883 is 3881801921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1291081883 - 2¹⁰ = 1291080859 is a prime.

It is a super-2 number, since 2×1291081883² = 3333784857221651378, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1291081883.

It is not an unprimeable number, because it can be changed into a prime (1291081823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7093766 + ... + 7093947.

It is an arithmetic number, because the mean of its divisors is an integer number (198627996).

Almost surely, 2^1291081883 is an apocalyptic number.

1291081883 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1291081883 is a deficient number, since it is larger than the sum of its proper divisors (297942085).

1291081883 is a wasteful number, since it uses less digits than its factorization.

1291081883 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14187733.

The product of its (nonzero) digits is 27648, while the sum is 41.

The square root of 1291081883 is about 35931.6278924293. The cubic root of 1291081883 is about 1088.8914698702.

The spelling of 1291081883 in words is "one billion, two hundred ninety-one million, eighty-one thousand, eight hundred eighty-three".