81414037 has 4 divisors (see below), whose sum is σ = 86203116. Its totient is φ = 76624960.

The previous prime is 81414013. The next prime is 81414059. The reversal of 81414037 is 73041418.

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 38825361 + 42588676 = 6231^2 + 6526^2 .

It is a cyclic number.

It is not a de Polignac number, because 81414037 - 2⁷ = 81413909 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 81413996 and 81414014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81411037) 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, 2394514 + ... + 2394547.

It is an arithmetic number, because the mean of its divisors is an integer number (21550779).

Almost surely, 2^81414037 is an apocalyptic number.

It is an amenable number.

81414037 is a deficient number, since it is larger than the sum of its proper divisors (4789079).

81414037 is a wasteful number, since it uses less digits than its factorization.

81414037 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4789078.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 81414037 is about 9022.9727362993. The cubic root of 81414037 is about 433.4108341988.

The spelling of 81414037 in words is "eighty-one million, four hundred fourteen thousand, thirty-seven".