740906639 has 4 divisors (see below), whose sum is σ = 808261800. Its totient is φ = 673551480.

The previous prime is 740906633. The next prime is 740906657. The reversal of 740906639 is 936609047.

740906639 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 740906639 - 2⁴ = 740906623 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 740906639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (740906633) 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, 33677564 + ... + 33677585.

It is an arithmetic number, because the mean of its divisors is an integer number (202065450).

Almost surely, 2^740906639 is an apocalyptic number.

740906639 is a deficient number, since it is larger than the sum of its proper divisors (67355161).

740906639 is a wasteful number, since it uses less digits than its factorization.

740906639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67355160.

The product of its (nonzero) digits is 244944, while the sum is 44.

The square root of 740906639 is about 27219.6002725977. The cubic root of 740906639 is about 904.8734147298.

The spelling of 740906639 in words is "seven hundred forty million, nine hundred six thousand, six hundred thirty-nine".