126643313 has 4 divisors (see below), whose sum is σ = 132149568. Its totient is φ = 121137060.

The previous prime is 126643291. The next prime is 126643343. The reversal of 126643313 is 313346621.

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 126643313 - 2⁸ = 126643057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126643343) 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, 2753093 + ... + 2753138.

It is an arithmetic number, because the mean of its divisors is an integer number (33037392).

Almost surely, 2^126643313 is an apocalyptic number.

It is an amenable number.

126643313 is a deficient number, since it is larger than the sum of its proper divisors (5506255).

126643313 is an equidigital number, since it uses as much as digits as its factorization.

126643313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5506254.

The product of its digits is 7776, while the sum is 29.

The square root of 126643313 is about 11253.5911157283. The cubic root of 126643313 is about 502.1815518201.

Adding to 126643313 its reverse (313346621), we get a palindrome (439989934).

The spelling of 126643313 in words is "one hundred twenty-six million, six hundred forty-three thousand, three hundred thirteen".