1380424391 has 4 divisors (see below), whose sum is σ = 1380522000. Its totient is φ = 1380326784.

The previous prime is 1380424301. The next prime is 1380424403. The reversal of 1380424391 is 1934240831.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1380424391 - 2¹⁸ = 1380162247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1380424301) 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, 23066 + ... + 57383.

It is an arithmetic number, because the mean of its divisors is an integer number (345130500).

Almost surely, 2^1380424391 is an apocalyptic number.

1380424391 is a deficient number, since it is larger than the sum of its proper divisors (97609).

1380424391 is an equidigital number, since it uses as much as digits as its factorization.

1380424391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97608.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 1380424391 is about 37154.0629137649. The cubic root of 1380424391 is about 1113.4503978184.

The spelling of 1380424391 in words is "one billion, three hundred eighty million, four hundred twenty-four thousand, three hundred ninety-one".