1397426919 has 8 divisors (see below), whose sum is σ = 2129412480. Its totient is φ = 798529656.

The previous prime is 1397426887. The next prime is 1397426923. The reversal of 1397426919 is 9196247931.

1397426919 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 1397426919 - 2⁵ = 1397426887 is a prime.

It is a super-2 number, since 2×1397426919² = 3905603987891665122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1397426519) 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, 33272049 + ... + 33272090.

It is an arithmetic number, because the mean of its divisors is an integer number (266176560).

Almost surely, 2^1397426919 is an apocalyptic number.

1397426919 is a deficient number, since it is larger than the sum of its proper divisors (731985561).

1397426919 is an equidigital number, since it uses as much as digits as its factorization.

1397426919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66544149.

The product of its digits is 734832, while the sum is 51.

The square root of 1397426919 is about 37382.1738131960. The cubic root of 1397426919 is about 1118.0031700504.

The spelling of 1397426919 in words is "one billion, three hundred ninety-seven million, four hundred twenty-six thousand, nine hundred nineteen".