738404621 has 4 divisors (see below), whose sum is σ = 738492000. Its totient is φ = 738317244.

The previous prime is 738404617. The next prime is 738404651. The reversal of 738404621 is 126404837.

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: 126404837 = 13 ⋅9723449.

It is a cyclic number.

It is not a de Polignac number, because 738404621 - 2² = 738404617 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 (738404651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29471 + ... + 48428.

It is an arithmetic number, because the mean of its divisors is an integer number (184623000).

Almost surely, 2^738404621 is an apocalyptic number.

It is an amenable number.

738404621 is a deficient number, since it is larger than the sum of its proper divisors (87379).

738404621 is an equidigital number, since it uses as much as digits as its factorization.

738404621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87378.

The product of its (nonzero) digits is 32256, while the sum is 35.

The square root of 738404621 is about 27173.6015463538. The cubic root of 738404621 is about 903.8536898234.

The spelling of 738404621 in words is "seven hundred thirty-eight million, four hundred four thousand, six hundred twenty-one".