83012020997 has 4 divisors (see below), whose sum is σ = 83084018700. Its totient is φ = 82940023296.

The previous prime is 83012020981. The next prime is 83012021009. The reversal of 83012020997 is 79902021038.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 64407333796 + 18604687201 = 253786^2 + 136399^2 .

It is a cyclic number.

It is not a de Polignac number, because 83012020997 - 2⁴ = 83012020981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83012020907) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35997122 + ... + 35999427.

It is an arithmetic number, because the mean of its divisors is an integer number (20771004675).

Almost surely, 2^83012020997 is an apocalyptic number.

It is an amenable number.

83012020997 is a deficient number, since it is larger than the sum of its proper divisors (71997703).

83012020997 is a wasteful number, since it uses less digits than its factorization.

83012020997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71997702.

The product of its (nonzero) digits is 54432, while the sum is 41.

Adding to 83012020997 its sum of digits (41), we get a palindrome (83012021038).

The spelling of 83012020997 in words is "eighty-three billion, twelve million, twenty thousand, nine hundred ninety-seven".