43722739 has 2 divisors, whose sum is σ = 43722740. Its totient is φ = 43722738.

The previous prime is 43722733. The next prime is 43722761. The reversal of 43722739 is 93722734.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 43722739 - 2⁷ = 43722611 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 43722698 and 43722707.

It is not a weakly prime, because it can be changed into another prime (43722733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21861369 + 21861370.

It is an arithmetic number, because the mean of its divisors is an integer number (21861370).

Almost surely, 2^43722739 is an apocalyptic number.

43722739 is a deficient number, since it is larger than the sum of its proper divisors (1).

43722739 is an equidigital number, since it uses as much as digits as its factorization.

43722739 is an evil number, because the sum of its binary digits is even.

The product of its digits is 63504, while the sum is 37.

The square root of 43722739 is about 6612.3172186458. The cubic root of 43722739 is about 352.2917341927.

The spelling of 43722739 in words is "forty-three million, seven hundred twenty-two thousand, seven hundred thirty-nine".