1340401019 has 4 divisors (see below), whose sum is σ = 1347346296. Its totient is φ = 1333455744.

The previous prime is 1340401009. The next prime is 1340401021. The reversal of 1340401019 is 9101040431.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1340401019 - 2¹² = 1340396923 is a prime.

It is a super-2 number, since 2×1340401019² = 3593349783472476722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1340400985 and 1340401003.

It is not an unprimeable number, because it can be changed into a prime (1340401009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3472349 + ... + 3472734.

It is an arithmetic number, because the mean of its divisors is an integer number (336836574).

Almost surely, 2^1340401019 is an apocalyptic number.

1340401019 is a deficient number, since it is larger than the sum of its proper divisors (6945277).

1340401019 is an equidigital number, since it uses as much as digits as its factorization.

1340401019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6945276.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 1340401019 is about 36611.4875278238. The cubic root of 1340401019 is about 1102.5837388212.

The spelling of 1340401019 in words is "one billion, three hundred forty million, four hundred one thousand, nineteen".