612822649 has 4 divisors (see below), whose sum is σ = 639467136. Its totient is φ = 586178164.

The previous prime is 612822641. The next prime is 612822709. The reversal of 612822649 is 946228216.

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 612822649 - 2³ = 612822641 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (612822641) 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, 13322209 + ... + 13322254.

It is an arithmetic number, because the mean of its divisors is an integer number (159866784).

Almost surely, 2^612822649 is an apocalyptic number.

It is an amenable number.

612822649 is a deficient number, since it is larger than the sum of its proper divisors (26644487).

612822649 is a wasteful number, since it uses less digits than its factorization.

612822649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26644486.

The product of its digits is 82944, while the sum is 40.

The square root of 612822649 is about 24755.2549774790. The cubic root of 612822649 is about 849.3987207838.

The spelling of 612822649 in words is "six hundred twelve million, eight hundred twenty-two thousand, six hundred forty-nine".