630506953 has 4 divisors (see below), whose sum is σ = 631746180. Its totient is φ = 629267728.

The previous prime is 630506911. The next prime is 630507029. The reversal of 630506953 is 359605036.

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

It can be written as a sum of positive squares in 2 ways, for example, as 572549184 + 57957769 = 23928^2 + 7613^2 .

It is a cyclic number.

It is not a de Polignac number, because 630506953 - 2¹³ = 630498761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (630506453) 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, 618850 + ... + 619867.

It is an arithmetic number, because the mean of its divisors is an integer number (157936545).

Almost surely, 2^630506953 is an apocalyptic number.

It is an amenable number.

630506953 is a deficient number, since it is larger than the sum of its proper divisors (1239227).

630506953 is a wasteful number, since it uses less digits than its factorization.

630506953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1239226.

The product of its (nonzero) digits is 72900, while the sum is 37.

The square root of 630506953 is about 25109.8975107427. The cubic root of 630506953 is about 857.4917691668.

The spelling of 630506953 in words is "six hundred thirty million, five hundred six thousand, nine hundred fifty-three".