1380922581 has 4 divisors (see below), whose sum is σ = 1841230112. Its totient is φ = 920615052.

The previous prime is 1380922577. The next prime is 1380922583. The reversal of 1380922581 is 1852290831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1380922581 - 2² = 1380922577 is a prime.

It is a super-2 number, since 2×1380922581² = 3813894349431403122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1380922583) 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, 230153761 + ... + 230153766.

It is an arithmetic number, because the mean of its divisors is an integer number (460307528).

Almost surely, 2^1380922581 is an apocalyptic number.

It is an amenable number.

1380922581 is a deficient number, since it is larger than the sum of its proper divisors (460307531).

1380922581 is an equidigital number, since it uses as much as digits as its factorization.

1380922581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460307530.

The product of its (nonzero) digits is 34560, while the sum is 39.

The square root of 1380922581 is about 37160.7666901532. The cubic root of 1380922581 is about 1113.5843284027.

The spelling of 1380922581 in words is "one billion, three hundred eighty million, nine hundred twenty-two thousand, five hundred eighty-one".