1291940703 has 12 divisors (see below), whose sum is σ = 1883258520. Its totient is φ = 853391376.

The previous prime is 1291940669. The next prime is 1291940711. The reversal of 1291940703 is 3070491921.

It is a de Polignac number, because none of the positive numbers 2^k-1291940703 is a prime.

It is a super-2 number, since 2×1291940703² = 3338221560136268418, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1291940723) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 657501 + ... + 659462.

It is an arithmetic number, because the mean of its divisors is an integer number (156938210).

Almost surely, 2^1291940703 is an apocalyptic number.

1291940703 is a deficient number, since it is larger than the sum of its proper divisors (591317817).

1291940703 is a wasteful number, since it uses less digits than its factorization.

1291940703 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1317078 (or 1317075 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 1291940703 is about 35943.5766584240. The cubic root of 1291940703 is about 1089.1328577343.

The spelling of 1291940703 in words is "one billion, two hundred ninety-one million, nine hundred forty thousand, seven hundred three".