16361491 has 4 divisors (see below), whose sum is σ = 16459632. Its totient is φ = 16263352.

The previous prime is 16361483. The next prime is 16361503. The reversal of 16361491 is 19416361.

16361491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19416361 = 61 ⋅318301.

It is a cyclic number.

It is not a de Polignac number, because 16361491 - 2³ = 16361483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16361431) 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, 48820 + ... + 49153.

It is an arithmetic number, because the mean of its divisors is an integer number (4114908).

Almost surely, 2^16361491 is an apocalyptic number.

16361491 is a deficient number, since it is larger than the sum of its proper divisors (98141).

16361491 is an equidigital number, since it uses as much as digits as its factorization.

16361491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98140.

The product of its digits is 3888, while the sum is 31.

The square root of 16361491 is about 4044.9339920449. The cubic root of 16361491 is about 253.8678037785.

The spelling of 16361491 in words is "sixteen million, three hundred sixty-one thousand, four hundred ninety-one".