899392777421 has 8 divisors (see below), whose sum is σ = 930419677080. Its totient is φ = 868366768192.

The previous prime is 899392777403. The next prime is 899392777453. The reversal of 899392777421 is 124777293998.

It can be written as a sum of positive squares in 4 ways, for example, as 89547570025 + 809845207396 = 299245^2 + 899914^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 899392777421 - 2⁶ = 899392777357 is a prime.

It is a super-3 number, since 3×899392777421³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (899392777121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2327771 + ... + 2686503.

It is an arithmetic number, because the mean of its divisors is an integer number (116302459635).

Almost surely, 2^899392777421 is an apocalyptic number.

It is an amenable number.

899392777421 is a deficient number, since it is larger than the sum of its proper divisors (31026899659).

899392777421 is a wasteful number, since it uses less digits than its factorization.

899392777421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 445215.

The product of its digits is 96018048, while the sum is 68.

The spelling of 899392777421 in words is "eight hundred ninety-nine billion, three hundred ninety-two million, seven hundred seventy-seven thousand, four hundred twenty-one".