1630442197 has 4 divisors (see below), whose sum is σ = 1630623136. Its totient is φ = 1630261260.

The previous prime is 1630442189. The next prime is 1630442201. The reversal of 1630442197 is 7912440361.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1630442197 - 2³ = 1630442189 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 (1630442797) 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, 76203 + ... + 95224.

It is an arithmetic number, because the mean of its divisors is an integer number (407655784).

Almost surely, 2^1630442197 is an apocalyptic number.

It is an amenable number.

1630442197 is a deficient number, since it is larger than the sum of its proper divisors (180939).

1630442197 is an equidigital number, since it uses as much as digits as its factorization.

1630442197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180938.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 1630442197 is about 40378.7344650622. The cubic root of 1630442197 is about 1176.9783354334.

The spelling of 1630442197 in words is "one billion, six hundred thirty million, four hundred forty-two thousand, one hundred ninety-seven".