42993009 has 6 divisors (see below), whose sum is σ = 62101026. Its totient is φ = 28662000.

The previous prime is 42993007. The next prime is 42993011. The reversal of 42993009 is 90039924.

It is an interprime number because it is at equal distance from previous prime (42993007) and next prime (42993011).

It can be written as a sum of positive squares in only one way, i.e., 42614784 + 378225 = 6528^2 + 615^2 .

It is not a de Polignac number, because 42993009 - 2¹ = 42993007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42993007) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2388492 + ... + 2388509.

It is an arithmetic number, because the mean of its divisors is an integer number (10350171).

Almost surely, 2^42993009 is an apocalyptic number.

It is an amenable number.

42993009 is a deficient number, since it is larger than the sum of its proper divisors (19108017).

42993009 is a wasteful number, since it uses less digits than its factorization.

42993009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4777007 (or 4777004 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 36.

The square root of 42993009 is about 6556.9054438813. The cubic root of 42993009 is about 350.3208187648.

The spelling of 42993009 in words is "forty-two million, nine hundred ninety-three thousand, nine".