1378577697 has 16 divisors (see below), whose sum is σ = 2101557120. Its totient is φ = 787433472.

The previous prime is 1378577689. The next prime is 1378577701. The reversal of 1378577697 is 7967758731.

It is not a de Polignac number, because 1378577697 - 2³ = 1378577689 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1378577697.

It is not an unprimeable number, because it can be changed into a prime (1378577687) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44263 + ... + 68675.

It is an arithmetic number, because the mean of its divisors is an integer number (131347320).

Almost surely, 2^1378577697 is an apocalyptic number.

It is an amenable number.

1378577697 is a deficient number, since it is larger than the sum of its proper divisors (722979423).

1378577697 is a wasteful number, since it uses less digits than its factorization.

1378577697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27112.

The product of its digits is 15558480, while the sum is 60.

The square root of 1378577697 is about 37129.2027520118. The cubic root of 1378577697 is about 1112.9536617482.

The spelling of 1378577697 in words is "one billion, three hundred seventy-eight million, five hundred seventy-seven thousand, six hundred ninety-seven".