738080821 has 4 divisors (see below), whose sum is σ = 776927200. Its totient is φ = 699234444.

The previous prime is 738080813. The next prime is 738080839. The reversal of 738080821 is 128080837.

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: 128080837 = 97 ⋅1320421.

It is a cyclic number.

It is not a de Polignac number, because 738080821 - 2³ = 738080813 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 (738080221) 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, 19423161 + ... + 19423198.

It is an arithmetic number, because the mean of its divisors is an integer number (194231800).

Almost surely, 2^738080821 is an apocalyptic number.

It is an amenable number.

738080821 is a deficient number, since it is larger than the sum of its proper divisors (38846379).

738080821 is a wasteful number, since it uses less digits than its factorization.

738080821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38846378.

The product of its (nonzero) digits is 21504, while the sum is 37.

The square root of 738080821 is about 27167.6429047498. The cubic root of 738080821 is about 903.7215533198.

The spelling of 738080821 in words is "seven hundred thirty-eight million, eighty thousand, eight hundred twenty-one".