83147002781 has 4 divisors (see below), whose sum is σ = 83152304064. Its totient is φ = 83141701500.

The previous prime is 83147002739. The next prime is 83147002787. The reversal of 83147002781 is 18720074138.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 83147002781 - 2⁶ = 83147002717 is a prime.

It is a super-2 number, since 2×83147002781² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83147002787) 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, 2627045 + ... + 2658506.

It is an arithmetic number, because the mean of its divisors is an integer number (20788076016).

Almost surely, 2^83147002781 is an apocalyptic number.

It is an amenable number.

83147002781 is a deficient number, since it is larger than the sum of its proper divisors (5301283).

83147002781 is a wasteful number, since it uses less digits than its factorization.

83147002781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5301282.

The product of its (nonzero) digits is 75264, while the sum is 41.

The spelling of 83147002781 in words is "eighty-three billion, one hundred forty-seven million, two thousand, seven hundred eighty-one".