1349873897 has 4 divisors (see below), whose sum is σ = 1359585360. Its totient is φ = 1340162436.

The previous prime is 1349873893. The next prime is 1349873909. The reversal of 1349873897 is 7983789431.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7983789431 = 24517 ⋅325643.

It is a cyclic number.

It is not a de Polignac number, because 1349873897 - 2² = 1349873893 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1349873893) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4855523 + ... + 4855800.

It is an arithmetic number, because the mean of its divisors is an integer number (339896340).

Almost surely, 2^1349873897 is an apocalyptic number.

It is an amenable number.

1349873897 is a deficient number, since it is larger than the sum of its proper divisors (9711463).

1349873897 is an equidigital number, since it uses as much as digits as its factorization.

1349873897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9711462.

The product of its digits is 9144576, while the sum is 59.

The square root of 1349873897 is about 36740.6300571996. The cubic root of 1349873897 is about 1105.1750361188.

The spelling of 1349873897 in words is "one billion, three hundred forty-nine million, eight hundred seventy-three thousand, eight hundred ninety-seven".