748331021 has 8 divisors (see below), whose sum is σ = 766640160. Its totient is φ = 730063152.

The previous prime is 748330987. The next prime is 748331027. The reversal of 748331021 is 120133847.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 748331021 - 2¹⁰ = 748329997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (748331027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28115 + ... + 47823.

It is an arithmetic number, because the mean of its divisors is an integer number (95830020).

Almost surely, 2^748331021 is an apocalyptic number.

It is an amenable number.

748331021 is a deficient number, since it is larger than the sum of its proper divisors (18309139).

748331021 is a wasteful number, since it uses less digits than its factorization.

748331021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20635.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 748331021 is about 27355.6396562025. The cubic root of 748331021 is about 907.8858545309.

Adding to 748331021 its reverse (120133847), we get a palindrome (868464868).

The spelling of 748331021 in words is "seven hundred forty-eight million, three hundred thirty-one thousand, twenty-one".