81876351 has 8 divisors (see below), whose sum is σ = 110395440. Its totient is φ = 53970752.

The previous prime is 81876341. The next prime is 81876359. The reversal of 81876351 is 15367818.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 81876351 - 2⁹ = 81875839 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81876359) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 153060 + ... + 153593.

It is an arithmetic number, because the mean of its divisors is an integer number (13799430).

Almost surely, 2^81876351 is an apocalyptic number.

81876351 is a deficient number, since it is larger than the sum of its proper divisors (28519089).

81876351 is a wasteful number, since it uses less digits than its factorization.

81876351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306745.

The product of its digits is 40320, while the sum is 39.

The square root of 81876351 is about 9048.5551885370. Note that the first 3 decimals coincide. The cubic root of 81876351 is about 434.2296684833.

The spelling of 81876351 in words is "eighty-one million, eight hundred seventy-six thousand, three hundred fifty-one".