1397881859 has 8 divisors (see below), whose sum is σ = 1532705328. Its totient is φ = 1264348960.

The previous prime is 1397881847. The next prime is 1397881873. The reversal of 1397881859 is 9581887931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1397881859 - 2¹² = 1397877763 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1397881798 and 1397881807.

It is not an unprimeable number, because it can be changed into a prime (1397880859) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 320372 + ... + 324705.

It is an arithmetic number, because the mean of its divisors is an integer number (191588166).

Almost surely, 2^1397881859 is an apocalyptic number.

1397881859 is a deficient number, since it is larger than the sum of its proper divisors (134823469).

1397881859 is a wasteful number, since it uses less digits than its factorization.

1397881859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645285.

The product of its digits is 4354560, while the sum is 59.

The square root of 1397881859 is about 37388.2583039114. The cubic root of 1397881859 is about 1118.1244809088.

The spelling of 1397881859 in words is "one billion, three hundred ninety-seven million, eight hundred eighty-one thousand, eight hundred fifty-nine".