618623349 has 4 divisors (see below), whose sum is σ = 824831136. Its totient is φ = 412415564.

The previous prime is 618623347. The next prime is 618623371. The reversal of 618623349 is 943326816.

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 618623349 - 2¹ = 618623347 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 618623349.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (618623347) 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, 103103889 + ... + 103103894.

It is an arithmetic number, because the mean of its divisors is an integer number (206207784).

Almost surely, 2^618623349 is an apocalyptic number.

It is an amenable number.

618623349 is a deficient number, since it is larger than the sum of its proper divisors (206207787).

618623349 is a wasteful number, since it uses less digits than its factorization.

618623349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206207786.

The product of its digits is 186624, while the sum is 42.

The square root of 618623349 is about 24872.1400164923. The cubic root of 618623349 is about 852.0703161675.

The spelling of 618623349 in words is "six hundred eighteen million, six hundred twenty-three thousand, three hundred forty-nine".