1377975797 has 8 divisors (see below), whose sum is σ = 1510879392. Its totient is φ = 1246344400.

The previous prime is 1377975791. The next prime is 1377975827. The reversal of 1377975797 is 7975797731.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1377975797 - 2⁶ = 1377975733 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1377975791) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 315779 + ... + 320112.

It is an arithmetic number, because the mean of its divisors is an integer number (188859924).

Almost surely, 2^1377975797 is an apocalyptic number.

It is an amenable number.

1377975797 is a deficient number, since it is larger than the sum of its proper divisors (132903595).

1377975797 is a wasteful number, since it uses less digits than its factorization.

1377975797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636099.

The product of its digits is 20420505, while the sum is 62.

The square root of 1377975797 is about 37121.0963873644. The cubic root of 1377975797 is about 1112.7916628206.

The spelling of 1377975797 in words is "one billion, three hundred seventy-seven million, nine hundred seventy-five thousand, seven hundred ninety-seven".