630142901 has 4 divisors (see below), whose sum is σ = 630419532. Its totient is φ = 629866272.

The previous prime is 630142897. The next prime is 630142957. The reversal of 630142901 is 109241036.

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 490666801 + 139476100 = 22151^2 + 11810^2 .

It is a cyclic number.

It is not a de Polignac number, because 630142901 - 2² = 630142897 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (630142001) 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, 134870 + ... + 139463.

It is an arithmetic number, because the mean of its divisors is an integer number (157604883).

Almost surely, 2^630142901 is an apocalyptic number.

It is an amenable number.

630142901 is a deficient number, since it is larger than the sum of its proper divisors (276631).

630142901 is a wasteful number, since it uses less digits than its factorization.

630142901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276630.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 630142901 is about 25102.6472906743. The cubic root of 630142901 is about 857.3267000408.

Adding to 630142901 its reverse (109241036), we get a palindrome (739383937).

The spelling of 630142901 in words is "six hundred thirty million, one hundred forty-two thousand, nine hundred one".