42723547 has 2 divisors, whose sum is σ = 42723548. Its totient is φ = 42723546.

The previous prime is 42723529. The next prime is 42723557. The reversal of 42723547 is 74532724.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42723547 - 2¹⁵ = 42690779 is a prime.

It is a super-2 number, since 2×42723547² = 3650602936522418, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (42723557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21361773 + 21361774.

It is an arithmetic number, because the mean of its divisors is an integer number (21361774).

Almost surely, 2^42723547 is an apocalyptic number.

42723547 is a deficient number, since it is larger than the sum of its proper divisors (1).

42723547 is an equidigital number, since it uses as much as digits as its factorization.

42723547 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47040, while the sum is 34.

The square root of 42723547 is about 6536.3251908087. The cubic root of 42723547 is about 349.5873967803.

The spelling of 42723547 in words is "forty-two million, seven hundred twenty-three thousand, five hundred forty-seven".