748639 has 2 divisors, whose sum is σ = 748640. Its totient is φ = 748638.

The previous prime is 748637. The next prime is 748669. The reversal of 748639 is 936847.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 748639 - 2¹ = 748637 is a prime.

Together with 748637, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 748598 and 748607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (748633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 374319 + 374320.

It is an arithmetic number, because the mean of its divisors is an integer number (374320).

2⁷⁴⁸⁶³⁹ is an apocalyptic number.

748639 is a deficient number, since it is larger than the sum of its proper divisors (1).

748639 is an equidigital number, since it uses as much as digits as its factorization.

748639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 37.

The square root of 748639 is about 865.2392732649. The cubic root of 748639 is about 90.8010385619.

The spelling of 748639 in words is "seven hundred forty-eight thousand, six hundred thirty-nine".