7121537423 has 16 divisors (see below), whose sum is σ = 9561785856. Its totient is φ = 5122383840.

The previous prime is 7121537419. The next prime is 7121537429. The reversal of 7121537423 is 3247351217.

It is a happy number.

It is not a de Polignac number, because 7121537423 - 2² = 7121537419 is a prime.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7121537429) 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, 3556211 + ... + 3558212.

It is an arithmetic number, because the mean of its divisors is an integer number (597611616).

Almost surely, 2^7121537423 is an apocalyptic number.

7121537423 is a deficient number, since it is larger than the sum of its proper divisors (2440248433).

7121537423 is a wasteful number, since it uses less digits than its factorization.

7121537423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7114454.

The product of its digits is 35280, while the sum is 35.

The square root of 7121537423 is about 84389.2020521583. The cubic root of 7121537423 is about 1923.9388021122.

The spelling of 7121537423 in words is "seven billion, one hundred twenty-one million, five hundred thirty-seven thousand, four hundred twenty-three".