738999421 has 4 divisors (see below), whose sum is σ = 762838144. Its totient is φ = 715160700.

The previous prime is 738999413. The next prime is 738999439. The reversal of 738999421 is 124999837.

It is a happy number.

738999421 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: 124999837 = 47 ⋅2659571.

It is not a de Polignac number, because 738999421 - 2³ = 738999413 is a prime.

It is a super-2 number, since 2×738999421² = 1092240288476670482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (738999491) 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, 11919315 + ... + 11919376.

It is an arithmetic number, because the mean of its divisors is an integer number (190709536).

Almost surely, 2^738999421 is an apocalyptic number.

It is an amenable number.

738999421 is a deficient number, since it is larger than the sum of its proper divisors (23838723).

738999421 is a wasteful number, since it uses less digits than its factorization.

738999421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23838722.

The product of its digits is 979776, while the sum is 52.

The square root of 738999421 is about 27184.5437887046. The cubic root of 738999421 is about 904.0963155562.

The spelling of 738999421 in words is "seven hundred thirty-eight million, nine hundred ninety-nine thousand, four hundred twenty-one".