69890619921 has 4 divisors (see below), whose sum is σ = 93187493232. Its totient is φ = 46593746612.

The previous prime is 69890619907. The next prime is 69890619923. The reversal of 69890619921 is 12991609896.

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 69890619921 - 2¹⁹ = 69890095633 is a prime.

It is a super-3 number, since 3×69890619921³ (a number of 34 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (69890619923) 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, 11648436651 + ... + 11648436656.

It is an arithmetic number, because the mean of its divisors is an integer number (23296873308).

Almost surely, 2^69890619921 is an apocalyptic number.

It is an amenable number.

69890619921 is a deficient number, since it is larger than the sum of its proper divisors (23296873311).

69890619921 is a wasteful number, since it uses less digits than its factorization.

69890619921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23296873310.

The product of its (nonzero) digits is 3779136, while the sum is 60.

The spelling of 69890619921 in words is "sixty-nine billion, eight hundred ninety million, six hundred nineteen thousand, nine hundred twenty-one".