9048400721 has 4 divisors (see below), whose sum is σ = 9441809472. Its totient is φ = 8654991972.

The previous prime is 9048400687. The next prime is 9048400729. The reversal of 9048400721 is 1270048409.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1270048409 = 7 ⋅181435487.

It is a cyclic number.

It is not a de Polignac number, because 9048400721 - 2²² = 9044206417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9048400729) 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, 196704341 + ... + 196704386.

It is an arithmetic number, because the mean of its divisors is an integer number (2360452368).

Almost surely, 2^9048400721 is an apocalyptic number.

It is an amenable number.

9048400721 is a deficient number, since it is larger than the sum of its proper divisors (393408751).

9048400721 is a wasteful number, since it uses less digits than its factorization.

9048400721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393408750.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 9048400721 is about 95123.0819570098. The cubic root of 9048400721 is about 2083.8059570345.

The spelling of 9048400721 in words is "nine billion, forty-eight million, four hundred thousand, seven hundred twenty-one".