16401629 has 4 divisors (see below), whose sum is σ = 16485084. Its totient is φ = 16318176.

The previous prime is 16401589. The next prime is 16401641. The reversal of 16401629 is 92610461.

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

It can be written as a sum of positive squares in 2 ways, for example, as 15405625 + 996004 = 3925^2 + 998^2 .

It is a cyclic number.

It is not a de Polignac number, because 16401629 - 2⁸ = 16401373 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 (16401529) 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, 41432 + ... + 41825.

It is an arithmetic number, because the mean of its divisors is an integer number (4121271).

Almost surely, 2^16401629 is an apocalyptic number.

It is an amenable number.

16401629 is a deficient number, since it is larger than the sum of its proper divisors (83455).

16401629 is an equidigital number, since it uses as much as digits as its factorization.

16401629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83454.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 16401629 is about 4049.8924677082. The cubic root of 16401629 is about 254.0752303664.

The spelling of 16401629 in words is "sixteen million, four hundred one thousand, six hundred twenty-nine".