42726493 has 2 divisors, whose sum is σ = 42726494. Its totient is φ = 42726492.

The previous prime is 42726407. The next prime is 42726499. The reversal of 42726493 is 39462724.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40729924 + 1996569 = 6382^2 + 1413^2 .

It is a cyclic number.

It is not a de Polignac number, because 42726493 - 2²¹ = 40629341 is a prime.

It is equal to p_2589049 and since 42726493 and 2589049 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42726499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21363246 + 21363247.

It is an arithmetic number, because the mean of its divisors is an integer number (21363247).

Almost surely, 2^42726493 is an apocalyptic number.

It is an amenable number.

42726493 is a deficient number, since it is larger than the sum of its proper divisors (1).

42726493 is an equidigital number, since it uses as much as digits as its factorization.

42726493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 37.

The square root of 42726493 is about 6536.5505429087. The cubic root of 42726493 is about 349.5954318560.

The spelling of 42726493 in words is "forty-two million, seven hundred twenty-six thousand, four hundred ninety-three".