747140647 has 4 divisors (see below), whose sum is σ = 815062536. Its totient is φ = 679218760.

The previous prime is 747140489. The next prime is 747140677. The reversal of 747140647 is 746041747.

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

It is a de Polignac number, because none of the positive numbers 2^k-747140647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (747140677) 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, 33960928 + ... + 33960949.

It is an arithmetic number, because the mean of its divisors is an integer number (203765634).

Almost surely, 2^747140647 is an apocalyptic number.

747140647 is a deficient number, since it is larger than the sum of its proper divisors (67921889).

747140647 is a wasteful number, since it uses less digits than its factorization.

747140647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67921888.

The product of its (nonzero) digits is 131712, while the sum is 40.

The square root of 747140647 is about 27333.8736186440. The cubic root of 747140647 is about 907.4042061559.

The spelling of 747140647 in words is "seven hundred forty-seven million, one hundred forty thousand, six hundred forty-seven".