9720408837 has 4 divisors (see below), whose sum is σ = 12960545120. Its totient is φ = 6480272556.

The previous prime is 9720408809. The next prime is 9720408839. The reversal of 9720408837 is 7388040279.

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 not a de Polignac number, because 9720408837 - 2¹⁸ = 9720146693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9720408839) 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, 1620068137 + ... + 1620068142.

It is an arithmetic number, because the mean of its divisors is an integer number (3240136280).

Almost surely, 2^9720408837 is an apocalyptic number.

It is an amenable number.

9720408837 is a deficient number, since it is larger than the sum of its proper divisors (3240136283).

9720408837 is a wasteful number, since it uses less digits than its factorization.

9720408837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3240136282.

The product of its (nonzero) digits is 677376, while the sum is 48.

The square root of 9720408837 is about 98592.1337480836. The cubic root of 9720408837 is about 2134.1659038710.

The spelling of 9720408837 in words is "nine billion, seven hundred twenty million, four hundred eight thousand, eight hundred thirty-seven".