740761643 has 4 divisors (see below), whose sum is σ = 743996640. Its totient is φ = 737526648.

The previous prime is 740761631. The next prime is 740761649. The reversal of 740761643 is 346167047.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 346167047 = 151 ⋅2292497.

It is a cyclic number.

It is not a de Polignac number, because 740761643 - 2⁴ = 740761627 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 740761597 and 740761606.

It is not an unprimeable number, because it can be changed into a prime (740761649) 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, 1617155 + ... + 1617612.

It is an arithmetic number, because the mean of its divisors is an integer number (185999160).

Almost surely, 2^740761643 is an apocalyptic number.

740761643 is a deficient number, since it is larger than the sum of its proper divisors (3234997).

740761643 is a wasteful number, since it uses less digits than its factorization.

740761643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3234996.

The product of its (nonzero) digits is 84672, while the sum is 38.

The square root of 740761643 is about 27216.9366939044. The cubic root of 740761643 is about 904.8143827374.

The spelling of 740761643 in words is "seven hundred forty million, seven hundred sixty-one thousand, six hundred forty-three".