43097861 has 8 divisors (see below), whose sum is σ = 43620504. Its totient is φ = 42577920.

The previous prime is 43097849. The next prime is 43097863. The reversal of 43097861 is 16879034.

It can be written as a sum of positive squares in 4 ways, for example, as 12737761 + 30360100 = 3569^2 + 5510^2 .

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 43097861 - 2¹⁴ = 43081477 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 (43097863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64871 + ... + 65531.

It is an arithmetic number, because the mean of its divisors is an integer number (5452563).

Almost surely, 2^43097861 is an apocalyptic number.

It is an amenable number.

43097861 is a deficient number, since it is larger than the sum of its proper divisors (522643).

43097861 is a wasteful number, since it uses less digits than its factorization.

43097861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1351.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 43097861 is about 6564.8961149435. The cubic root of 43097861 is about 350.6053767973.

The spelling of 43097861 in words is "forty-three million, ninety-seven thousand, eight hundred sixty-one".