1223426739 has 16 divisors (see below), whose sum is σ = 1728039680. Its totient is φ = 767763360.

The previous prime is 1223426717. The next prime is 1223426747. The reversal of 1223426739 is 9376243221.

It is not a de Polignac number, because 1223426739 - 2⁹ = 1223426227 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1223426697 and 1223426706.

It is not an unprimeable number, because it can be changed into a prime (1223427739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59407 + ... + 77304.

It is an arithmetic number, because the mean of its divisors is an integer number (108002480).

Almost surely, 2^1223426739 is an apocalyptic number.

1223426739 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1223426739 is a deficient number, since it is larger than the sum of its proper divisors (504612941).

1223426739 is a wasteful number, since it uses less digits than its factorization.

1223426739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136890.

The product of its digits is 108864, while the sum is 39.

The square root of 1223426739 is about 34977.5176220383. The cubic root of 1223426739 is about 1069.5292245825.

The spelling of 1223426739 in words is "one billion, two hundred twenty-three million, four hundred twenty-six thousand, seven hundred thirty-nine".