16440097 has 4 divisors (see below), whose sum is σ = 16456960. Its totient is φ = 16423236.

The previous prime is 16440091. The next prime is 16440103. The reversal of 16440097 is 79004461.

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, and also an emirpimes, since its reverse is a distinct semiprime: 79004461 = 31 ⋅2548531.

It is an interprime number because it is at equal distance from previous prime (16440091) and next prime (16440103).

It is a cyclic number.

It is not a de Polignac number, because 16440097 - 2³ = 16440089 is a prime.

It is a super-3 number, since 3×16440097³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a nialpdrome in base 8.

It is not an unprimeable number, because it can be changed into a prime (16440091) 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, 6873 + ... + 8950.

It is an arithmetic number, because the mean of its divisors is an integer number (4114240).

Almost surely, 2^16440097 is an apocalyptic number.

It is an amenable number.

16440097 is a deficient number, since it is larger than the sum of its proper divisors (16863).

16440097 is a wasteful number, since it uses less digits than its factorization.

16440097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16862.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 16440097 is about 4054.6389481679. The cubic root of 16440097 is about 254.2737093274.

The spelling of 16440097 in words is "sixteen million, four hundred forty thousand, ninety-seven".