1349856797 has 8 divisors (see below), whose sum is σ = 1448840376. Its totient is φ = 1253048832.

The previous prime is 1349856791. The next prime is 1349856847. The reversal of 1349856797 is 7976589431.

It can be written as a sum of positive squares in 4 ways, for example, as 304886521 + 1044970276 = 17461^2 + 32326^2 .

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 1349856797 - 2²⁴ = 1333079581 is a prime.

It is a super-2 number, since 2×1349856797² = 3644226744814198418, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1349856791) 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, 542618 + ... + 545099.

It is an arithmetic number, because the mean of its divisors is an integer number (181105047).

Almost surely, 2^1349856797 is an apocalyptic number.

1349856797 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1349856797 is a deficient number, since it is larger than the sum of its proper divisors (98983579).

1349856797 is a wasteful number, since it uses less digits than its factorization.

1349856797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1087807.

The product of its digits is 11430720, while the sum is 59.

The square root of 1349856797 is about 36740.3973440680. The cubic root of 1349856797 is about 1105.1703693686.

The spelling of 1349856797 in words is "one billion, three hundred forty-nine million, eight hundred fifty-six thousand, seven hundred ninety-seven".