9919733125 has 10 divisors (see below), whose sum is σ = 12395699294. Its totient is φ = 7935786000.

The previous prime is 9919733101. The next prime is 9919733129. The reversal of 9919733125 is 5213379199.

It can be written as a sum of positive squares in 5 ways, for example, as 1092566916 + 8827166209 = 33054^2 + 93953^2 .

It is not a de Polignac number, because 9919733125 - 2⁵ = 9919733093 is a prime.

It is a super-2 number, since 2×9919733125² (a number of 21 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 (9919733129) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 7935162 + ... + 7936411.

Almost surely, 2^9919733125 is an apocalyptic number.

It is an amenable number.

9919733125 is a deficient number, since it is larger than the sum of its proper divisors (2475966169).

9919733125 is an equidigital number, since it uses as much as digits as its factorization.

9919733125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15871593 (or 15871578 counting only the distinct ones).

The product of its digits is 459270, while the sum is 49.

The square root of 9919733125 is about 99597.8570301590. The cubic root of 9919733125 is about 2148.6548734109.

It can be divided in two parts, 9919 and 733125, that added together give a square (743044 = 862²).

The spelling of 9919733125 in words is "nine billion, nine hundred nineteen million, seven hundred thirty-three thousand, one hundred twenty-five".