42646973 has 2 divisors, whose sum is σ = 42646974. Its totient is φ = 42646972.

The previous prime is 42646949. The next prime is 42646993. The reversal of 42646973 is 37964624.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38477209 + 4169764 = 6203^2 + 2042^2 .

It is a cyclic number.

It is not a de Polignac number, because 42646973 - 2¹⁴ = 42630589 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42646973.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42646913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21323486 + 21323487.

It is an arithmetic number, because the mean of its divisors is an integer number (21323487).

Almost surely, 2^42646973 is an apocalyptic number.

It is an amenable number.

42646973 is a deficient number, since it is larger than the sum of its proper divisors (1).

42646973 is an equidigital number, since it uses as much as digits as its factorization.

42646973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 41.

The square root of 42646973 is about 6530.4649911013. The cubic root of 42646973 is about 349.3784151129.

The spelling of 42646973 in words is "forty-two million, six hundred forty-six thousand, nine hundred seventy-three".