1349772538 has 4 divisors (see below), whose sum is σ = 2024658810. Its totient is φ = 674886268.

The previous prime is 1349772533. The next prime is 1349772539. The reversal of 1349772538 is 8352779431.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1206659169 + 143113369 = 34737^2 + 11963^2 .

It is a super-2 number, since 2×1349772538² = 3643771808677922888, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1349772491 and 1349772500.

It is not an unprimeable number, because it can be changed into a prime (1349772533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 337443133 + ... + 337443136.

Almost surely, 2^1349772538 is an apocalyptic number.

1349772538 is a deficient number, since it is larger than the sum of its proper divisors (674886272).

1349772538 is an equidigital number, since it uses as much as digits as its factorization.

1349772538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 674886271.

The product of its digits is 1270080, while the sum is 49.

The square root of 1349772538 is about 36739.2506455970. The cubic root of 1349772538 is about 1105.1473737224.

The spelling of 1349772538 in words is "one billion, three hundred forty-nine million, seven hundred seventy-two thousand, five hundred thirty-eight".