9902069281 has 4 divisors (see below), whose sum is σ = 10663766932. Its totient is φ = 9140371632.

The previous prime is 9902069251. The next prime is 9902069291. The reversal of 9902069281 is 1829602099.

9902069281 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1829602099 = 13 ⋅140738623.

It can be written as a sum of positive squares in 2 ways, for example, as 565678656 + 9336390625 = 23784^2 + 96625^2 .

It is a cyclic number.

It is not a de Polignac number, because 9902069281 - 2¹⁷ = 9901938209 is a prime.

It is a super-2 number, since 2×9902069281² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9902069251) 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, 380848806 + ... + 380848831.

It is an arithmetic number, because the mean of its divisors is an integer number (2665941733).

Almost surely, 2^9902069281 is an apocalyptic number.

It is an amenable number.

9902069281 is a deficient number, since it is larger than the sum of its proper divisors (761697651).

9902069281 is a wasteful number, since it uses less digits than its factorization.

9902069281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 761697650.

The product of its (nonzero) digits is 139968, while the sum is 46.

The square root of 9902069281 is about 99509.1416956251. The cubic root of 9902069281 is about 2147.3787619815.

The spelling of 9902069281 in words is "nine billion, nine hundred two million, sixty-nine thousand, two hundred eighty-one".