622418949 has 6 divisors (see below), whose sum is σ = 899049606. Its totient is φ = 414945960.

The previous prime is 622418933. The next prime is 622418963. The reversal of 622418949 is 949814226.

622418949 is a `hidden beast` number, since 622 + 4 + 18 + 9 + 4 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 378497025 + 243921924 = 19455^2 + 15618^2 .

It is not a de Polignac number, because 622418949 - 2⁴ = 622418933 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (622418989) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 34578822 + ... + 34578839.

It is an arithmetic number, because the mean of its divisors is an integer number (149841601).

Almost surely, 2^622418949 is an apocalyptic number.

It is an amenable number.

622418949 is a deficient number, since it is larger than the sum of its proper divisors (276630657).

622418949 is a wasteful number, since it uses less digits than its factorization.

622418949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69157667 (or 69157664 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The square root of 622418949 is about 24948.3255750762. The cubic root of 622418949 is about 853.8094067776.

The spelling of 622418949 in words is "six hundred twenty-two million, four hundred eighteen thousand, nine hundred forty-nine".