81879035 has 16 divisors (see below), whose sum is σ = 116164800. Its totient is φ = 54208896.

The previous prime is 81879013. The next prime is 81879041. The reversal of 81879035 is 53097818.

It is a happy number.

It is not a de Polignac number, because 81879035 - 2⁶ = 81878971 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 81878983 and 81879001.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39320 + ... + 41349.

It is an arithmetic number, because the mean of its divisors is an integer number (7260300).

Almost surely, 2^81879035 is an apocalyptic number.

81879035 is a deficient number, since it is larger than the sum of its proper divisors (34285765).

81879035 is a wasteful number, since it uses less digits than its factorization.

81879035 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80710.

The product of its (nonzero) digits is 60480, while the sum is 41.

The square root of 81879035 is about 9048.7034982919. The cubic root of 81879035 is about 434.2344132790.

The spelling of 81879035 in words is "eighty-one million, eight hundred seventy-nine thousand, thirty-five".