740734681 has 4 divisors (see below), whose sum is σ = 740806452. Its totient is φ = 740662912.

The previous prime is 740734669. The next prime is 740734691. The reversal of 740734681 is 186437047.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 186437047 = 233 ⋅800159.

It can be written as a sum of positive squares in 2 ways, for example, as 400000000 + 340734681 = 20000^2 + 18459^2 .

It is a cyclic number.

It is not a de Polignac number, because 740734681 - 2⁵ = 740734649 is a prime.

It is a super-2 number, since 2×740734681² = 1097375735272343522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (740734661) 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, 17140 + ... + 42133.

It is an arithmetic number, because the mean of its divisors is an integer number (185201613).

Almost surely, 2^740734681 is an apocalyptic number.

It is an amenable number.

740734681 is a deficient number, since it is larger than the sum of its proper divisors (71771).

740734681 is a wasteful number, since it uses less digits than its factorization.

740734681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71770.

The product of its (nonzero) digits is 112896, while the sum is 40.

The square root of 740734681 is about 27216.4413728173. The cubic root of 740734681 is about 904.8034048915.

The spelling of 740734681 in words is "seven hundred forty million, seven hundred thirty-four thousand, six hundred eighty-one".