1201997108 has 24 divisors (see below), whose sum is σ = 2277835560. Its totient is φ = 551698560.

The previous prime is 1201997107. The next prime is 1201997141. The reversal of 1201997108 is 8017991021.

It can be written as a sum of positive squares in 4 ways, for example, as 46812964 + 1155184144 = 6842^2 + 33988^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201997107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54443 + ... + 73266.

It is an arithmetic number, because the mean of its divisors is an integer number (94909815).

Almost surely, 2^1201997108 is an apocalyptic number.

It is an amenable number.

1201997108 is a deficient number, since it is larger than the sum of its proper divisors (1075838452).

1201997108 is a wasteful number, since it uses less digits than its factorization.

1201997108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127907 (or 127905 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 38.

The square root of 1201997108 is about 34669.8299390118. The cubic root of 1201997108 is about 1063.2477546542.

The spelling of 1201997108 in words is "one billion, two hundred one million, nine hundred ninety-seven thousand, one hundred eight".