16401967 has 4 divisors (see below), whose sum is σ = 17115120. Its totient is φ = 15688816.

The previous prime is 16401943. The next prime is 16401977. The reversal of 16401967 is 76910461.

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

It is a cyclic number.

It is not a de Polignac number, because 16401967 - 2⁷ = 16401839 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 (16401937) 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, 356542 + ... + 356587.

It is an arithmetic number, because the mean of its divisors is an integer number (4278780).

Almost surely, 2^16401967 is an apocalyptic number.

16401967 is a deficient number, since it is larger than the sum of its proper divisors (713153).

16401967 is an equidigital number, since it uses as much as digits as its factorization.

16401967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 713152.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 16401967 is about 4049.9341969963. The cubic root of 16401967 is about 254.0769756572.

The spelling of 16401967 in words is "sixteen million, four hundred one thousand, nine hundred sixty-seven".