16429391 has 4 divisors (see below), whose sum is σ = 17922984. Its totient is φ = 14935800.

The previous prime is 16429379. The next prime is 16429403. The reversal of 16429391 is 19392461.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (16429379) and next prime (16429403).

It is a de Polignac number, because none of the positive numbers 2^k-16429391 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 (16429331) 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, 746780 + ... + 746801.

It is an arithmetic number, because the mean of its divisors is an integer number (4480746).

Almost surely, 2^16429391 is an apocalyptic number.

16429391 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

16429391 is a deficient number, since it is larger than the sum of its proper divisors (1493593).

16429391 is a wasteful number, since it uses less digits than its factorization.

16429391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1493592.

The product of its digits is 11664, while the sum is 35.

The square root of 16429391 is about 4053.3185169685. The cubic root of 16429391 is about 254.2185019186.

The spelling of 16429391 in words is "sixteen million, four hundred twenty-nine thousand, three hundred ninety-one".