71794981 has 4 divisors (see below), whose sum is σ = 74270700. Its totient is φ = 69319264.

The previous prime is 71794973. The next prime is 71794997. The reversal of 71794981 is 18949717.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21242881 + 50552100 = 4609^2 + 7110^2 .

It is a cyclic number.

It is not a de Polignac number, because 71794981 - 2³ = 71794973 is a prime.

It is a super-2 number, since 2×71794981² = 10309038593580722, 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 (71794951) 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, 1237816 + ... + 1237873.

It is an arithmetic number, because the mean of its divisors is an integer number (18567675).

Almost surely, 2^71794981 is an apocalyptic number.

It is an amenable number.

71794981 is a deficient number, since it is larger than the sum of its proper divisors (2475719).

71794981 is a wasteful number, since it uses less digits than its factorization.

71794981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2475718.

The product of its digits is 127008, while the sum is 46.

The square root of 71794981 is about 8473.1919015209. The cubic root of 71794981 is about 415.6215219035.

The spelling of 71794981 in words is "seventy-one million, seven hundred ninety-four thousand, nine hundred eighty-one".