1630909797 has 16 divisors (see below), whose sum is σ = 2380809792. Its totient is φ = 984856320.

The previous prime is 1630909793. The next prime is 1630909837. The reversal of 1630909797 is 7979090361.

It is not a de Polignac number, because 1630909797 - 2² = 1630909793 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1630909793) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80068 + ... + 98349.

It is an arithmetic number, because the mean of its divisors is an integer number (148800612).

Almost surely, 2^1630909797 is an apocalyptic number.

It is an amenable number.

1630909797 is a deficient number, since it is larger than the sum of its proper divisors (749899995).

1630909797 is a wasteful number, since it uses less digits than its factorization.

1630909797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178708.

The product of its (nonzero) digits is 642978, while the sum is 51.

The square root of 1630909797 is about 40384.5242264905. The cubic root of 1630909797 is about 1177.0908412035.

The spelling of 1630909797 in words is "one billion, six hundred thirty million, nine hundred nine thousand, seven hundred ninety-seven".