1377660401 has 4 divisors (see below), whose sum is σ = 1483634292. Its totient is φ = 1271686512.

The previous prime is 1377660391. The next prime is 1377660413. The reversal of 1377660401 is 1040667731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1040667731 = 293 ⋅3551767.

It can be written as a sum of positive squares in 2 ways, for example, as 96020401 + 1281640000 = 9799^2 + 35800^2 .

It is a cyclic number.

It is not a de Polignac number, because 1377660401 - 2¹⁸ = 1377398257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1377660421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52986926 + ... + 52986951.

It is an arithmetic number, because the mean of its divisors is an integer number (370908573).

Almost surely, 2^1377660401 is an apocalyptic number.

It is an amenable number.

1377660401 is a deficient number, since it is larger than the sum of its proper divisors (105973891).

1377660401 is a wasteful number, since it uses less digits than its factorization.

1377660401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105973890.

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 1377660401 is about 37116.8479399854. The cubic root of 1377660401 is about 1112.7067564382.

The spelling of 1377660401 in words is "one billion, three hundred seventy-seven million, six hundred sixty thousand, four hundred one".