630450731 has 8 divisors (see below), whose sum is σ = 643315200. Its totient is φ = 617708520.

The previous prime is 630450721. The next prime is 630450739. The reversal of 630450731 is 137054036.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-630450731 is a prime.

It is a super-2 number, since 2×630450731² = 794936248436868722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 630450694 and 630450703.

It is not an unprimeable number, because it can be changed into a prime (630450739) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20111 + ... + 40808.

It is an arithmetic number, because the mean of its divisors is an integer number (80414400).

Almost surely, 2^630450731 is an apocalyptic number.

630450731 is a deficient number, since it is larger than the sum of its proper divisors (12864469).

630450731 is a wasteful number, since it uses less digits than its factorization.

630450731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61129.

The product of its (nonzero) digits is 7560, while the sum is 29.

The square root of 630450731 is about 25108.7779670776. Note that the first 3 decimals coincide. The cubic root of 630450731 is about 857.4662810338.

The spelling of 630450731 in words is "six hundred thirty million, four hundred fifty thousand, seven hundred thirty-one".