1337899991 has 8 divisors (see below), whose sum is σ = 1425285120. Its totient is φ = 1252211832.

The previous prime is 1337899973. The next prime is 1337899993. The reversal of 1337899991 is 1999987331.

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 1337899991 - 2¹⁴ = 1337883607 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1337899991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1337899993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 422615 + ... + 425768.

It is an arithmetic number, because the mean of its divisors is an integer number (178160640).

Almost surely, 2^1337899991 is an apocalyptic number.

1337899991 is a deficient number, since it is larger than the sum of its proper divisors (87385129).

1337899991 is an equidigital number, since it uses as much as digits as its factorization.

1337899991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 848485.

The product of its digits is 3306744, while the sum is 59.

The square root of 1337899991 is about 36577.3152513959. The cubic root of 1337899991 is about 1101.8975487291.

The spelling of 1337899991 in words is "one billion, three hundred thirty-seven million, eight hundred ninety-nine thousand, nine hundred ninety-one".