630698451 has 4 divisors (see below), whose sum is σ = 840931272. Its totient is φ = 420465632.

The previous prime is 630698401. The next prime is 630698473. The reversal of 630698451 is 154896036.

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

It is a cyclic number.

It is not a de Polignac number, because 630698451 - 2¹⁵ = 630665683 is a prime.

It is not an unprimeable number, because it can be changed into a prime (630698401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105116406 + ... + 105116411.

It is an arithmetic number, because the mean of its divisors is an integer number (210232818).

Almost surely, 2^630698451 is an apocalyptic number.

630698451 is a deficient number, since it is larger than the sum of its proper divisors (210232821).

630698451 is a wasteful number, since it uses less digits than its factorization.

630698451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210232820.

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 630698451 is about 25113.7104188131. The cubic root of 630698451 is about 857.5785730402.

The spelling of 630698451 in words is "six hundred thirty million, six hundred ninety-eight thousand, four hundred fifty-one".