921372413 has 4 divisors (see below), whose sum is σ = 992247228. Its totient is φ = 850497600.

The previous prime is 921372407. The next prime is 921372437. The reversal of 921372413 is 314273129.

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 89453764 + 831918649 = 9458^2 + 28843^2 .

It is a cyclic number.

It is not a de Polignac number, because 921372413 - 2¹⁶ = 921306877 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 921372413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (921372013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35437388 + ... + 35437413.

It is an arithmetic number, because the mean of its divisors is an integer number (248061807).

Almost surely, 2^921372413 is an apocalyptic number.

It is an amenable number.

921372413 is a deficient number, since it is larger than the sum of its proper divisors (70874815).

921372413 is a wasteful number, since it uses less digits than its factorization.

921372413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70874814.

The product of its digits is 9072, while the sum is 32.

The square root of 921372413 is about 30354.1169036426. The cubic root of 921372413 is about 973.0722067880.

The spelling of 921372413 in words is "nine hundred twenty-one million, three hundred seventy-two thousand, four hundred thirteen".