40537397 has 8 divisors (see below), whose sum is σ = 41659800. Its totient is φ = 39421440.

The previous prime is 40537373. The next prime is 40537423. The reversal of 40537397 is 79373504.

40537397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1274641 + 39262756 = 1129^2 + 6266^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40537397 - 2¹² = 40533301 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40537397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40537327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12893 + ... + 15725.

It is an arithmetic number, because the mean of its divisors is an integer number (5207475).

Almost surely, 2^40537397 is an apocalyptic number.

It is an amenable number.

40537397 is a deficient number, since it is larger than the sum of its proper divisors (1122403).

40537397 is a wasteful number, since it uses less digits than its factorization.

40537397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3223.

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

The square root of 40537397 is about 6366.8985385351. The cubic root of 40537397 is about 343.5199411832.

The spelling of 40537397 in words is "forty million, five hundred thirty-seven thousand, three hundred ninety-seven".