42723623 has 2 divisors, whose sum is σ = 42723624. Its totient is φ = 42723622.

The previous prime is 42723619. The next prime is 42723643. The reversal of 42723623 is 32632724.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42723623 - 2² = 42723619 is a prime.

It is a super-2 number, since 2×42723623² = 3650615924492258, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42723643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21361811 + 21361812.

It is an arithmetic number, because the mean of its divisors is an integer number (21361812).

Almost surely, 2^42723623 is an apocalyptic number.

42723623 is a deficient number, since it is larger than the sum of its proper divisors (1).

42723623 is an equidigital number, since it uses as much as digits as its factorization.

42723623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 29.

The square root of 42723623 is about 6536.3310044703. The cubic root of 42723623 is about 349.5876040713.

The spelling of 42723623 in words is "forty-two million, seven hundred twenty-three thousand, six hundred twenty-three".