81960034 has 32 divisors (see below), whose sum is σ = 140132160. Its totient is φ = 35640000.

The previous prime is 81960029. The next prime is 81960037. The reversal of 81960034 is 43006918.

It is a junction number, because it is equal to n+sod(n) for n = 81959978 and 81960005.

It is not an unprimeable number, because it can be changed into a prime (81960037) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123664 + ... + 124324.

It is an arithmetic number, because the mean of its divisors is an integer number (4379130).

Almost surely, 2^81960034 is an apocalyptic number.

81960034 is a deficient number, since it is larger than the sum of its proper divisors (58172126).

81960034 is a wasteful number, since it uses less digits than its factorization.

81960034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 946.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 81960034 is about 9053.1781159988. The cubic root of 81960034 is about 434.3775551771.

The spelling of 81960034 in words is "eighty-one million, nine hundred sixty thousand, thirty-four".