81202034 has 4 divisors (see below), whose sum is σ = 121803054. Its totient is φ = 40601016.

The previous prime is 81202031. The next prime is 81202049. The reversal of 81202034 is 43020218.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 68973025 + 12229009 = 8305^2 + 3497^2 .

It is a junction number, because it is equal to n+sod(n) for n = 81201997 and 81202015.

It is not an unprimeable number, because it can be changed into a prime (81202031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20300507 + ... + 20300510.

Almost surely, 2^81202034 is an apocalyptic number.

81202034 is a deficient number, since it is larger than the sum of its proper divisors (40601020).

81202034 is a wasteful number, since it uses less digits than its factorization.

81202034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40601019.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 81202034 is about 9011.2171208999. The cubic root of 81202034 is about 433.0343050726.

The spelling of 81202034 in words is "eighty-one million, two hundred two thousand, thirty-four".