731906954421 has 4 divisors (see below), whose sum is σ = 975875939232. Its totient is φ = 487937969612.

The previous prime is 731906954357. The next prime is 731906954459. The reversal of 731906954421 is 124459609137.

It is a happy number.

731906954421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 124459609137 = 3 ⋅41486536379.

It is a cyclic number.

It is not a de Polignac number, because 731906954421 - 2⁶ = 731906954357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (731906954021) 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, 121984492401 + ... + 121984492406.

It is an arithmetic number, because the mean of its divisors is an integer number (243968984808).

Almost surely, 2^731906954421 is an apocalyptic number.

It is an amenable number.

731906954421 is a deficient number, since it is larger than the sum of its proper divisors (243968984811).

731906954421 is a wasteful number, since it uses less digits than its factorization.

731906954421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243968984810.

The product of its (nonzero) digits is 1632960, while the sum is 51.

The spelling of 731906954421 in words is "seven hundred thirty-one billion, nine hundred six million, nine hundred fifty-four thousand, four hundred twenty-one".