1290916739 has 8 divisors (see below), whose sum is σ = 1481777760. Its totient is φ = 1101666816.

The previous prime is 1290916729. The next prime is 1290916747. The reversal of 1290916739 is 9376190921.

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

It is a cyclic number.

It is not a de Polignac number, because 1290916739 - 2⁸ = 1290916483 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1290916693 and 1290916702.

It is not an unprimeable number, because it can be changed into a prime (1290916729) 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, 401054 + ... + 404259.

It is an arithmetic number, because the mean of its divisors is an integer number (185222220).

Almost surely, 2^1290916739 is an apocalyptic number.

1290916739 is a deficient number, since it is larger than the sum of its proper divisors (190861021).

1290916739 is an equidigital number, since it uses as much as digits as its factorization.

1290916739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 805549.

The product of its (nonzero) digits is 183708, while the sum is 47.

The square root of 1290916739 is about 35929.3297877931. The cubic root of 1290916739 is about 1088.8450407054.

The spelling of 1290916739 in words is "one billion, two hundred ninety million, nine hundred sixteen thousand, seven hundred thirty-nine".