16138791 has 16 divisors (see below), whose sum is σ = 23979520. Its totient is φ = 10727640.

The previous prime is 16138783. The next prime is 16138799. The reversal of 16138791 is 19783161.

16138791 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (16138783) and next prime (16138799).

It is not a de Polignac number, because 16138791 - 2³ = 16138783 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 (16138799) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11856 + ... + 13146.

It is an arithmetic number, because the mean of its divisors is an integer number (1498720).

Almost surely, 2^16138791 is an apocalyptic number.

16138791 is a deficient number, since it is larger than the sum of its proper divisors (7840729).

16138791 is a wasteful number, since it uses less digits than its factorization.

16138791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1763 (or 1757 counting only the distinct ones).

The product of its digits is 9072, while the sum is 36.

The square root of 16138791 is about 4017.3114143666. The cubic root of 16138791 is about 252.7107204146.

It can be divided in two parts, 1613 and 8791, that added together give a square (10404 = 102²).

The spelling of 16138791 in words is "sixteen million, one hundred thirty-eight thousand, seven hundred ninety-one".