40053997 has 4 divisors (see below), whose sum is σ = 40309276. Its totient is φ = 39798720.

The previous prime is 40053973. The next prime is 40054019. The reversal of 40053997 is 79935004.

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 10666756 + 29387241 = 3266^2 + 5421^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40053997 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 (40053907) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127404 + ... + 127717.

It is an arithmetic number, because the mean of its divisors is an integer number (10077319).

Almost surely, 2^40053997 is an apocalyptic number.

It is an amenable number.

40053997 is a deficient number, since it is larger than the sum of its proper divisors (255279).

40053997 is a wasteful number, since it uses less digits than its factorization.

40053997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255278.

The product of its (nonzero) digits is 34020, while the sum is 37.

The square root of 40053997 is about 6328.8227183261. The cubic root of 40053997 is about 342.1490094262.

The spelling of 40053997 in words is "forty million, fifty-three thousand, nine hundred ninety-seven".