738071993 has 4 divisors (see below), whose sum is σ = 739876980. Its totient is φ = 736267008.

The previous prime is 738071989. The next prime is 738072029. The reversal of 738071993 is 399170837.

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

It can be written as a sum of positive squares in 2 ways, for example, as 659873344 + 78198649 = 25688^2 + 8843^2 .

It is a cyclic number.

It is not a de Polignac number, because 738071993 - 2² = 738071989 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (738071293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 901880 + ... + 902697.

It is an arithmetic number, because the mean of its divisors is an integer number (184969245).

Almost surely, 2^738071993 is an apocalyptic number.

It is an amenable number.

738071993 is a deficient number, since it is larger than the sum of its proper divisors (1804987).

738071993 is a wasteful number, since it uses less digits than its factorization.

738071993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1804986.

The product of its (nonzero) digits is 285768, while the sum is 47.

The square root of 738071993 is about 27167.4804315748. The cubic root of 738071993 is about 903.7179502430.

The spelling of 738071993 in words is "seven hundred thirty-eight million, seventy-one thousand, nine hundred ninety-three".