1379553977 has 4 divisors (see below), whose sum is σ = 1379680116. Its totient is φ = 1379427840.

The previous prime is 1379553949. The next prime is 1379554003. The reversal of 1379553977 is 7793559731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7793559731 = 29 ⋅268743439.

It can be written as a sum of positive squares in 2 ways, for example, as 84345856 + 1295208121 = 9184^2 + 35989^2 .

It is a cyclic number.

It is not a de Polignac number, because 1379553977 - 2⁶ = 1379553913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1379553947) 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, 44924 + ... + 69117.

It is an arithmetic number, because the mean of its divisors is an integer number (344920029).

Almost surely, 2^1379553977 is an apocalyptic number.

It is an amenable number.

1379553977 is a deficient number, since it is larger than the sum of its proper divisors (126139).

1379553977 is a wasteful number, since it uses less digits than its factorization.

1379553977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126138.

The product of its digits is 6251175, while the sum is 56.

The square root of 1379553977 is about 37142.3474890858. The cubic root of 1379553977 is about 1113.2163232851.

The spelling of 1379553977 in words is "one billion, three hundred seventy-nine million, five hundred fifty-three thousand, nine hundred seventy-seven".