1397071197 has 24 divisors (see below), whose sum is σ = 2181622560. Its totient is φ = 858509280.

The previous prime is 1397071183. The next prime is 1397071211. The reversal of 1397071197 is 7911707931.

1397071197 is a `hidden beast` number, since 1 + 397 + 0 + 71 + 197 = 666.

It is an interprime number because it is at equal distance from previous prime (1397071183) and next prime (1397071211).

It is not a de Polignac number, because 1397071197 - 2¹⁰ = 1397070173 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1397071157) 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 23 ways as a sum of consecutive naturals, for example, 104079 + ... + 116732.

It is an arithmetic number, because the mean of its divisors is an integer number (90900940).

Almost surely, 2^1397071197 is an apocalyptic number.

It is an amenable number.

1397071197 is a deficient number, since it is larger than the sum of its proper divisors (784551363).

1397071197 is a wasteful number, since it uses less digits than its factorization.

1397071197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220873 (or 220870 counting only the distinct ones).

The product of its (nonzero) digits is 83349, while the sum is 45.

The square root of 1397071197 is about 37377.4156008679. The cubic root of 1397071197 is about 1117.9082975701.

The spelling of 1397071197 in words is "one billion, three hundred ninety-seven million, seventy-one thousand, one hundred ninety-seven".