83890736669 has 4 divisors (see below), whose sum is σ = 84375654396. Its totient is φ = 83405818944.

The previous prime is 83890736627. The next prime is 83890736681. The reversal of 83890736669 is 96663709838.

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 76488199225 + 7402537444 = 276565^2 + 86038^2 .

It is a cyclic number.

It is not a de Polignac number, because 83890736669 - 2³⁶ = 15171259933 is a prime.

It is a super-2 number, since 2×83890736669² (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 (83890736269) 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, 242458604 + ... + 242458949.

It is an arithmetic number, because the mean of its divisors is an integer number (21093913599).

Almost surely, 2^83890736669 is an apocalyptic number.

It is an amenable number.

83890736669 is a deficient number, since it is larger than the sum of its proper divisors (484917727).

83890736669 is a wasteful number, since it uses less digits than its factorization.

83890736669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484917726.

The product of its (nonzero) digits is 70543872, while the sum is 65.

The spelling of 83890736669 in words is "eighty-three billion, eight hundred ninety million, seven hundred thirty-six thousand, six hundred sixty-nine".