9920970125 has 32 divisors (see below), whose sum is σ = 13613543424. Its totient is φ = 7158312000.

The previous prime is 9920970119. The next prime is 9920970133. The reversal of 9920970125 is 5210790299.

It is a happy number.

It is not a de Polignac number, because 9920970125 - 2⁸ = 9920969869 is a prime.

It is a super-2 number, since 2×9920970125² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 146219 + ... + 203031.

It is an arithmetic number, because the mean of its divisors is an integer number (425423232).

Almost surely, 2^9920970125 is an apocalyptic number.

It is an amenable number.

9920970125 is a deficient number, since it is larger than the sum of its proper divisors (3692573299).

9920970125 is a wasteful number, since it uses less digits than its factorization.

9920970125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56966 (or 56956 counting only the distinct ones).

The product of its (nonzero) digits is 102060, while the sum is 44.

The square root of 9920970125 is about 99604.0668095435. The cubic root of 9920970125 is about 2148.7441827896.

The spelling of 9920970125 in words is "nine billion, nine hundred twenty million, nine hundred seventy thousand, one hundred twenty-five".