613920819 has 8 divisors (see below), whose sum is σ = 822168000. Its totient is φ = 407477096.

The previous prime is 613920817. The next prime is 613920877. The reversal of 613920819 is 918029316.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 613920819 - 2¹ = 613920817 is a prime.

It is a super-2 number, since 2×613920819² = 753797544003261522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (613920817) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 450069 + ... + 451430.

It is an arithmetic number, because the mean of its divisors is an integer number (102771000).

Almost surely, 2^613920819 is an apocalyptic number.

613920819 is a deficient number, since it is larger than the sum of its proper divisors (208247181).

613920819 is a wasteful number, since it uses less digits than its factorization.

613920819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 901729.

The product of its (nonzero) digits is 23328, while the sum is 39.

The square root of 613920819 is about 24777.4255926640. The cubic root of 613920819 is about 849.9057884048.

The spelling of 613920819 in words is "six hundred thirteen million, nine hundred twenty thousand, eight hundred nineteen".