43140997 has 4 divisors (see below), whose sum is σ = 44144320. Its totient is φ = 42137676.

The previous prime is 43140991. The next prime is 43141003. The reversal of 43140997 is 79904134.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (43140991) and next prime (43141003).

It is a cyclic number.

It is not a de Polignac number, because 43140997 - 2³ = 43140989 is a prime.

It is a super-2 number, since 2×43140997² = 3722291244308018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43140991) 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, 501597 + ... + 501682.

It is an arithmetic number, because the mean of its divisors is an integer number (11036080).

Almost surely, 2^43140997 is an apocalyptic number.

It is an amenable number.

43140997 is a deficient number, since it is larger than the sum of its proper divisors (1003323).

43140997 is a wasteful number, since it uses less digits than its factorization.

43140997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1003322.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 43140997 is about 6568.1806461150. The cubic root of 43140997 is about 350.7223096743.

The spelling of 43140997 in words is "forty-three million, one hundred forty thousand, nine hundred ninety-seven".