16397429 has 4 divisors (see below), whose sum is σ = 16550784. Its totient is φ = 16244076.

The previous prime is 16397411. The next prime is 16397467. The reversal of 16397429 is 92479361.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16397429 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16397629) 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, 76517 + ... + 76730.

It is an arithmetic number, because the mean of its divisors is an integer number (4137696).

Almost surely, 2^16397429 is an apocalyptic number.

It is an amenable number.

16397429 is a deficient number, since it is larger than the sum of its proper divisors (153355).

16397429 is a wasteful number, since it uses less digits than its factorization.

16397429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153354.

The product of its digits is 81648, while the sum is 41.

The square root of 16397429 is about 4049.3739022224. The cubic root of 16397429 is about 254.0535413202.

The spelling of 16397429 in words is "sixteen million, three hundred ninety-seven thousand, four hundred twenty-nine".