7891262213 has 4 divisors (see below), whose sum is σ = 8025012480. Its totient is φ = 7757511948.

The previous prime is 7891262177. The next prime is 7891262237. The reversal of 7891262213 is 3122621987.

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 a cyclic number.

It is not a de Polignac number, because 7891262213 - 2⁸ = 7891261957 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 (7891262513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66875045 + ... + 66875162.

It is an arithmetic number, because the mean of its divisors is an integer number (2006253120).

Almost surely, 2^7891262213 is an apocalyptic number.

It is an amenable number.

7891262213 is a deficient number, since it is larger than the sum of its proper divisors (133750267).

7891262213 is a wasteful number, since it uses less digits than its factorization.

7891262213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133750266.

The product of its digits is 72576, while the sum is 41.

The square root of 7891262213 is about 88832.7766818082. The cubic root of 7891262213 is about 1990.8971496645.

The spelling of 7891262213 in words is "seven billion, eight hundred ninety-one million, two hundred sixty-two thousand, two hundred thirteen".