1379745973 has 4 divisors (see below), whose sum is σ = 1380925408. Its totient is φ = 1378566540.

The previous prime is 1379745949. The next prime is 1379745977. The reversal of 1379745973 is 3795479731.

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 a de Polignac number, because none of the positive numbers 2^k-1379745973 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 (1379745977) 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, 587961 + ... + 590302.

It is an arithmetic number, because the mean of its divisors is an integer number (345231352).

Almost surely, 2^1379745973 is an apocalyptic number.

It is an amenable number.

1379745973 is a deficient number, since it is larger than the sum of its proper divisors (1179435).

1379745973 is a wasteful number, since it uses less digits than its factorization.

1379745973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1179434.

The product of its digits is 5000940, while the sum is 55.

The square root of 1379745973 is about 37144.9319961687. The cubic root of 1379745973 is about 1113.2679639290.

The spelling of 1379745973 in words is "one billion, three hundred seventy-nine million, seven hundred forty-five thousand, nine hundred seventy-three".