16378073 has 4 divisors (see below), whose sum is σ = 16646628. Its totient is φ = 16109520.

The previous prime is 16378051. The next prime is 16378081. The reversal of 16378073 is 37087361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 37087361 = 947 ⋅39163.

It can be written as a sum of positive squares in 2 ways, for example, as 9259849 + 7118224 = 3043^2 + 2668^2 .

It is a cyclic number.

It is not a de Polignac number, because 16378073 - 2⁶ = 16378009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16378003) 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, 134186 + ... + 134307.

It is an arithmetic number, because the mean of its divisors is an integer number (4161657).

Almost surely, 2^16378073 is an apocalyptic number.

It is an amenable number.

16378073 is a deficient number, since it is larger than the sum of its proper divisors (268555).

16378073 is an equidigital number, since it uses as much as digits as its factorization.

16378073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268554.

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 16378073 is about 4046.9831973953. The cubic root of 16378073 is about 253.9535379087.

The spelling of 16378073 in words is "sixteen million, three hundred seventy-eight thousand, seventy-three".