1350971991 has 12 divisors (see below), whose sum is σ = 2054109720. Its totient is φ = 853245360.

The previous prime is 1350971983. The next prime is 1350972011. The reversal of 1350971991 is 1991790531.

It is a happy number.

It is not a de Polignac number, because 1350971991 - 2³ = 1350971983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1350970991) 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 in 11 ways as a sum of consecutive naturals, for example, 3950040 + ... + 3950381.

It is an arithmetic number, because the mean of its divisors is an integer number (171175810).

Almost surely, 2^1350971991 is an apocalyptic number.

1350971991 is a deficient number, since it is larger than the sum of its proper divisors (703137729).

1350971991 is a wasteful number, since it uses less digits than its factorization.

1350971991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7900446 (or 7900443 counting only the distinct ones).

The product of its (nonzero) digits is 76545, while the sum is 45.

The square root of 1350971991 is about 36755.5708838810. The cubic root of 1350971991 is about 1105.4746337706.

The spelling of 1350971991 in words is "one billion, three hundred fifty million, nine hundred seventy-one thousand, nine hundred ninety-one".