613830721 has 16 divisors (see below), whose sum is σ = 741823488. Its totient is φ = 496742400.

The previous prime is 613830697. The next prime is 613830743. The reversal of 613830721 is 127038316.

It is not a de Polignac number, because 613830721 - 2⁵ = 613830689 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is not an unprimeable number, because it can be changed into a prime (613830521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25600 + ... + 43393.

It is an arithmetic number, because the mean of its divisors is an integer number (46363968).

Almost surely, 2^613830721 is an apocalyptic number.

It is an amenable number.

613830721 is a deficient number, since it is larger than the sum of its proper divisors (127992767).

613830721 is a wasteful number, since it uses less digits than its factorization.

613830721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69072.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 613830721 is about 24775.6073790331. The cubic root of 613830721 is about 849.8642094500.

The spelling of 613830721 in words is "six hundred thirteen million, eight hundred thirty thousand, seven hundred twenty-one".