42999973 has 2 divisors, whose sum is σ = 42999974. Its totient is φ = 42999972.

The previous prime is 42999947. The next prime is 42999977. The reversal of 42999973 is 37999924.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36759969 + 6240004 = 6063^2 + 2498^2 .

It is a cyclic number.

It is not a de Polignac number, because 42999973 - 2¹⁷ = 42868901 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42999973.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42999977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21499986 + 21499987.

It is an arithmetic number, because the mean of its divisors is an integer number (21499987).

Almost surely, 2^42999973 is an apocalyptic number.

It is an amenable number.

42999973 is a deficient number, since it is larger than the sum of its proper divisors (1).

42999973 is an equidigital number, since it uses as much as digits as its factorization.

42999973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1102248, while the sum is 52.

The square root of 42999973 is about 6557.4364655710. The cubic root of 42999973 is about 350.3397327117.

The spelling of 42999973 in words is "forty-two million, nine hundred ninety-nine thousand, nine hundred seventy-three".