613502401 has 4 divisors (see below), whose sum is σ = 625077972. Its totient is φ = 601926832.

The previous prime is 613502363. The next prime is 613502413. The reversal of 613502401 is 104205316.

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

It can be written as a sum of positive squares in 2 ways, for example, as 293951025 + 319551376 = 17145^2 + 17876^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-613502401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (613502441) 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, 5787706 + ... + 5787811.

It is an arithmetic number, because the mean of its divisors is an integer number (156269493).

Almost surely, 2^613502401 is an apocalyptic number.

It is an amenable number.

613502401 is a deficient number, since it is larger than the sum of its proper divisors (11575571).

613502401 is a wasteful number, since it uses less digits than its factorization.

613502401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11575570.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 613502401 is about 24768.9806209299. The cubic root of 613502401 is about 849.7126599699.

Adding to 613502401 its reverse (104205316), we get a palindrome (717707717).

The spelling of 613502401 in words is "six hundred thirteen million, five hundred two thousand, four hundred one".