16070981 has 4 divisors (see below), whose sum is σ = 16133772. Its totient is φ = 16008192.

The previous prime is 16070969. The next prime is 16070993. The reversal of 16070981 is 18907061.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18907061 = 53 ⋅356737.

It is an interprime number because it is at equal distance from previous prime (16070969) and next prime (16070993).

It can be written as a sum of positive squares in 2 ways, for example, as 14508481 + 1562500 = 3809^2 + 1250^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16070981 is a prime.

It is a super-2 number, since 2×16070981² = 516552860604722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16070081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31010 + ... + 31523.

It is an arithmetic number, because the mean of its divisors is an integer number (4033443).

Almost surely, 2^16070981 is an apocalyptic number.

It is an amenable number.

16070981 is a deficient number, since it is larger than the sum of its proper divisors (62791).

16070981 is an equidigital number, since it uses as much as digits as its factorization.

16070981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62790.

The product of its (nonzero) digits is 3024, while the sum is 32.

The square root of 16070981 is about 4008.8628063330. The cubic root of 16070981 is about 252.3562872034.

The spelling of 16070981 in words is "sixteen million, seventy thousand, nine hundred eighty-one".