9429896421 has 16 divisors (see below), whose sum is σ = 15240237120. Its totient is φ = 5715088560.

The previous prime is 9429896401. The next prime is 9429896429. The reversal of 9429896421 is 1246989249.

9429896421 is a `hidden beast` number, since 9 + 42 + 98 + 96 + 421 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-9429896421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9429896429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15874950 + ... + 15875543.

It is an arithmetic number, because the mean of its divisors is an integer number (952514820).

Almost surely, 2^9429896421 is an apocalyptic number.

It is an amenable number.

9429896421 is a deficient number, since it is larger than the sum of its proper divisors (5810340699).

9429896421 is a wasteful number, since it uses less digits than its factorization.

9429896421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31750513 (or 31750507 counting only the distinct ones).

The product of its digits is 2239488, while the sum is 54.

The square root of 9429896421 is about 97107.6537714716. The cubic root of 9429896421 is about 2112.6893390790.

The spelling of 9429896421 in words is "nine billion, four hundred twenty-nine million, eight hundred ninety-six thousand, four hundred twenty-one".