743440007381 has 8 divisors (see below), whose sum is σ = 751211283480. Its totient is φ = 735670914048.

The previous prime is 743440007353. The next prime is 743440007393. The reversal of 743440007381 is 183700044347.

It can be written as a sum of positive squares in 4 ways, for example, as 70990806481 + 672449200900 = 266441^2 + 820030^2 .

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 743440007381 - 2¹⁰ = 743440006357 is a prime.

It is a super-2 number, since 2×743440007381² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (743440007311) 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, 143585 + ... + 1227801.

It is an arithmetic number, because the mean of its divisors is an integer number (93901410435).

Almost surely, 2^743440007381 is an apocalyptic number.

It is an amenable number.

743440007381 is a deficient number, since it is larger than the sum of its proper divisors (7771276099).

743440007381 is a wasteful number, since it uses less digits than its factorization.

743440007381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1091383.

The product of its (nonzero) digits is 225792, while the sum is 41.

The spelling of 743440007381 in words is "seven hundred forty-three billion, four hundred forty million, seven thousand, three hundred eighty-one".