1380931953 has 4 divisors (see below), whose sum is σ = 1841242608. Its totient is φ = 920621300.

The previous prime is 1380931949. The next prime is 1380931963. The reversal of 1380931953 is 3591390831.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 1380931953 - 2² = 1380931949 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1380931933) 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, 230155323 + ... + 230155328.

It is an arithmetic number, because the mean of its divisors is an integer number (460310652).

Almost surely, 2^1380931953 is an apocalyptic number.

It is an amenable number.

1380931953 is a deficient number, since it is larger than the sum of its proper divisors (460310655).

1380931953 is an equidigital number, since it uses as much as digits as its factorization.

1380931953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460310654.

The product of its (nonzero) digits is 87480, while the sum is 42.

The square root of 1380931953 is about 37160.8927906744. The cubic root of 1380931953 is about 1113.5868476095.

The spelling of 1380931953 in words is "one billion, three hundred eighty million, nine hundred thirty-one thousand, nine hundred fifty-three".