40397573 has 4 divisors (see below), whose sum is σ = 40555020. Its totient is φ = 40240128.

The previous prime is 40397569. The next prime is 40397579. The reversal of 40397573 is 37579304.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 32741284 + 7656289 = 5722^2 + 2767^2 .

It is a cyclic number.

It is not a de Polignac number, because 40397573 - 2² = 40397569 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40397579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78338 + ... + 78851.

It is an arithmetic number, because the mean of its divisors is an integer number (10138755).

Almost surely, 2^40397573 is an apocalyptic number.

It is an amenable number.

40397573 is a deficient number, since it is larger than the sum of its proper divisors (157447).

40397573 is a wasteful number, since it uses less digits than its factorization.

40397573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157446.

The product of its (nonzero) digits is 79380, while the sum is 38.

The square root of 40397573 is about 6355.9085109841. The cubic root of 40397573 is about 343.1245230655.

The spelling of 40397573 in words is "forty million, three hundred ninety-seven thousand, five hundred seventy-three".