126926309 has 4 divisors (see below), whose sum is σ = 126975840. Its totient is φ = 126876780.

The previous prime is 126926291. The next prime is 126926311. The reversal of 126926309 is 903629621.

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.

It is a cyclic number.

It is not a de Polignac number, because 126926309 - 2⁸ = 126926053 is a prime.

It is a super-2 number, since 2×126926309² = 32220575832726962, 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 (126926399) 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, 20699 + ... + 26120.

It is an arithmetic number, because the mean of its divisors is an integer number (31743960).

Almost surely, 2^126926309 is an apocalyptic number.

It is an amenable number.

126926309 is a deficient number, since it is larger than the sum of its proper divisors (49531).

126926309 is an equidigital number, since it uses as much as digits as its factorization.

126926309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49530.

The product of its (nonzero) digits is 34992, while the sum is 38.

The square root of 126926309 is about 11266.1576857418. The cubic root of 126926309 is about 502.5553303264. Note that the first 3 decimals are identical.

The spelling of 126926309 in words is "one hundred twenty-six million, nine hundred twenty-six thousand, three hundred nine".