16387061 has 4 divisors (see below), whose sum is σ = 16631712. Its totient is φ = 16142412.

The previous prime is 16387039. The next prime is 16387081. The reversal of 16387061 is 16078361.

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, and also an emirpimes, since its reverse is a distinct semiprime: 16078361 = 13 ⋅1236797.

It is a cyclic number.

It is not a de Polignac number, because 16387061 - 2¹⁸ = 16124917 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 (16387081) 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, 122225 + ... + 122358.

It is an arithmetic number, because the mean of its divisors is an integer number (4157928).

Almost surely, 2^16387061 is an apocalyptic number.

It is an amenable number.

16387061 is a deficient number, since it is larger than the sum of its proper divisors (244651).

16387061 is an equidigital number, since it uses as much as digits as its factorization.

16387061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244650.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 16387061 is about 4048.0935018846. The cubic root of 16387061 is about 253.9999845000. Note that the first 4 decimals are identical.

The spelling of 16387061 in words is "sixteen million, three hundred eighty-seven thousand, sixty-one".