612639361 has 4 divisors (see below), whose sum is σ = 626886832. Its totient is φ = 598391892.

The previous prime is 612639337. The next prime is 612639367. The reversal of 612639361 is 163936216.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 612639361 - 2¹³ = 612631169 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 612639361.

It is not an unprimeable number, because it can be changed into a prime (612639367) 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, 7123671 + ... + 7123756.

It is an arithmetic number, because the mean of its divisors is an integer number (156721708).

Almost surely, 2^612639361 is an apocalyptic number.

It is an amenable number.

612639361 is a deficient number, since it is larger than the sum of its proper divisors (14247471).

612639361 is a wasteful number, since it uses less digits than its factorization.

612639361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14247470.

The product of its digits is 34992, while the sum is 37.

The square root of 612639361 is about 24751.5526987702. The cubic root of 612639361 is about 849.3140306391.

The spelling of 612639361 in words is "six hundred twelve million, six hundred thirty-nine thousand, three hundred sixty-one".