47720709 has 6 divisors (see below), whose sum is σ = 68929926. Its totient is φ = 31813800.

The previous prime is 47720707. The next prime is 47720719. The reversal of 47720709 is 90702774.

It can be written as a sum of positive squares in only one way, i.e., 47568609 + 152100 = 6897^2 + 390^2 .

It is not a de Polignac number, because 47720709 - 2¹ = 47720707 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47720707) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2651142 + ... + 2651159.

It is an arithmetic number, because the mean of its divisors is an integer number (11488321).

Almost surely, 2^47720709 is an apocalyptic number.

It is an amenable number.

47720709 is a deficient number, since it is larger than the sum of its proper divisors (21209217).

47720709 is a wasteful number, since it uses less digits than its factorization.

47720709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5302307 (or 5302304 counting only the distinct ones).

The product of its (nonzero) digits is 24696, while the sum is 36.

The square root of 47720709 is about 6908.0177330404. The cubic root of 47720709 is about 362.7178783733.

The spelling of 47720709 in words is "forty-seven million, seven hundred twenty thousand, seven hundred nine".