16861403 has 8 divisors (see below), whose sum is σ = 18298896. Its totient is φ = 15444000.

The previous prime is 16861387. The next prime is 16861447. The reversal of 16861403 is 30416861.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16861403 - 2⁴ = 16861387 is a prime.

It is a super-2 number, since 2×16861403² = 568613822256818, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16861463) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3248 + ... + 6653.

It is an arithmetic number, because the mean of its divisors is an integer number (2287362).

Almost surely, 2^16861403 is an apocalyptic number.

16861403 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

16861403 is a deficient number, since it is larger than the sum of its proper divisors (1437493).

16861403 is a wasteful number, since it uses less digits than its factorization.

16861403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10045.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 16861403 is about 4106.2638736448. The cubic root of 16861403 is about 256.4274829928.

The spelling of 16861403 in words is "sixteen million, eight hundred sixty-one thousand, four hundred three".