613006642 has 4 divisors (see below), whose sum is σ = 919509966. Its totient is φ = 306503320.

The previous prime is 613006631. The next prime is 613006717. The reversal of 613006642 is 246600316.

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

It can be written as a sum of positive squares in only one way, i.e., 520250481 + 92756161 = 22809^2 + 9631^2 .

It is a super-2 number, since 2×613006642² = 751554286272232328, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 613006642.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 153251659 + ... + 153251662.

Almost surely, 2^613006642 is an apocalyptic number.

613006642 is a deficient number, since it is larger than the sum of its proper divisors (306503324).

613006642 is a wasteful number, since it uses less digits than its factorization.

613006642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306503323.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 613006642 is about 24758.9709398432. The cubic root of 613006642 is about 849.4837196987.

Adding to 613006642 its reverse (246600316), we get a palindrome (859606958).

The spelling of 613006642 in words is "six hundred thirteen million, six thousand, six hundred forty-two".