126799169 has 4 divisors (see below), whose sum is σ = 144913344. Its totient is φ = 108684996.

The previous prime is 126799157. The next prime is 126799171. The reversal of 126799169 is 961997621.

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: 961997621 = 13 ⋅73999817.

It is not a de Polignac number, because 126799169 - 2²⁰ = 125750593 is a prime.

It is a super-2 number, since 2×126799169² = 32156058518181122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126799109) 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, 9057077 + ... + 9057090.

It is an arithmetic number, because the mean of its divisors is an integer number (36228336).

Almost surely, 2^126799169 is an apocalyptic number.

It is an amenable number.

126799169 is a deficient number, since it is larger than the sum of its proper divisors (18114175).

126799169 is an equidigital number, since it uses as much as digits as its factorization.

126799169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18114174.

The product of its digits is 367416, while the sum is 50.

The square root of 126799169 is about 11260.5137094184. The cubic root of 126799169 is about 502.3874737929.

The spelling of 126799169 in words is "one hundred twenty-six million, seven hundred ninety-nine thousand, one hundred sixty-nine".