7793212421 has 4 divisors (see below), whose sum is σ = 7825549644. Its totient is φ = 7760875200.

The previous prime is 7793212409. The next prime is 7793212423. The reversal of 7793212421 is 1242123977.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3438532321 + 4354680100 = 58639^2 + 65990^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7793212421 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 (7793212423) 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, 16168250 + ... + 16168731.

It is an arithmetic number, because the mean of its divisors is an integer number (1956387411).

Almost surely, 2^7793212421 is an apocalyptic number.

It is an amenable number.

7793212421 is a deficient number, since it is larger than the sum of its proper divisors (32337223).

7793212421 is a wasteful number, since it uses less digits than its factorization.

7793212421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32337222.

The product of its digits is 42336, while the sum is 38.

The square root of 7793212421 is about 88279.1732007046. The cubic root of 7793212421 is about 1982.6170560928.

The spelling of 7793212421 in words is "seven billion, seven hundred ninety-three million, two hundred twelve thousand, four hundred twenty-one".