1371686397 has 16 divisors (see below), whose sum is σ = 1919877120. Its totient is φ = 869453552.

The previous prime is 1371686389. The next prime is 1371686431. The reversal of 1371686397 is 7936861731.

It is a cyclic number.

It is not a de Polignac number, because 1371686397 - 2³ = 1371686389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1371686297) 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, 47997 + ... + 71042.

It is an arithmetic number, because the mean of its divisors is an integer number (119992320).

Almost surely, 2^1371686397 is an apocalyptic number.

It is an amenable number.

1371686397 is a deficient number, since it is larger than the sum of its proper divisors (548190723).

1371686397 is a wasteful number, since it uses less digits than its factorization.

1371686397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119232.

The product of its digits is 1143072, while the sum is 51.

The square root of 1371686397 is about 37036.2848703808. The cubic root of 1371686397 is about 1111.0960677271.

The spelling of 1371686397 in words is "one billion, three hundred seventy-one million, six hundred eighty-six thousand, three hundred ninety-seven".