81876429 has 24 divisors (see below), whose sum is σ = 122522400. Its totient is φ = 52651872.

The previous prime is 81876427. The next prime is 81876461. The reversal of 81876429 is 92467818.

It is not a de Polignac number, because 81876429 - 2¹ = 81876427 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81876427) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30847 + ... + 33395.

It is an arithmetic number, because the mean of its divisors is an integer number (5105100).

Almost surely, 2^81876429 is an apocalyptic number.

It is an amenable number.

81876429 is a deficient number, since it is larger than the sum of its proper divisors (40645971).

81876429 is a wasteful number, since it uses less digits than its factorization.

81876429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2681 (or 2678 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 81876429 is about 9048.5594986163. The cubic root of 81876429 is about 434.2298063737.

The spelling of 81876429 in words is "eighty-one million, eight hundred seventy-six thousand, four hundred twenty-nine".