31426473773 has 4 divisors (see below), whose sum is σ = 31427325468. Its totient is φ = 31425622080.

The previous prime is 31426473739. The next prime is 31426473779. The reversal of 31426473773 is 37737462413.

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 10852013929 + 20574459844 = 104173^2 + 143438^2 .

It is a cyclic number.

It is not a de Polignac number, because 31426473773 - 2¹⁴ = 31426457389 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 (31426473779) 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, 367868 + ... + 445173.

It is an arithmetic number, because the mean of its divisors is an integer number (7856831367).

Almost surely, 2^31426473773 is an apocalyptic number.

It is an amenable number.

31426473773 is a deficient number, since it is larger than the sum of its proper divisors (851695).

31426473773 is an equidigital number, since it uses as much as digits as its factorization.

31426473773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 851694.

The product of its digits is 1778112, while the sum is 47.

The spelling of 31426473773 in words is "thirty-one billion, four hundred twenty-six million, four hundred seventy-three thousand, seven hundred seventy-three".