738494521 has 4 divisors (see below), whose sum is σ = 739728000. Its totient is φ = 737261044.

The previous prime is 738494479. The next prime is 738494531. The reversal of 738494521 is 125494837.

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.

It is a cyclic number.

It is not a de Polignac number, because 738494521 - 2²¹ = 736397369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (738494531) 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, 615841 + ... + 617038.

It is an arithmetic number, because the mean of its divisors is an integer number (184932000).

Almost surely, 2^738494521 is an apocalyptic number.

It is an amenable number.

738494521 is a deficient number, since it is larger than the sum of its proper divisors (1233479).

738494521 is a wasteful number, since it uses less digits than its factorization.

738494521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1233478.

The product of its digits is 241920, while the sum is 43.

The square root of 738494521 is about 27175.2556749702. The cubic root of 738494521 is about 903.8903694193.

The spelling of 738494521 in words is "seven hundred thirty-eight million, four hundred ninety-four thousand, five hundred twenty-one".