1378061677 has 4 divisors (see below), whose sum is σ = 1378220256. Its totient is φ = 1377903100.

The previous prime is 1378061653. The next prime is 1378061683. The reversal of 1378061677 is 7761608731.

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 not a de Polignac number, because 1378061677 - 2¹⁵ = 1378028909 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 (1378061627) 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, 65449 + ... + 83902.

It is an arithmetic number, because the mean of its divisors is an integer number (344555064).

Almost surely, 2^1378061677 is an apocalyptic number.

It is an amenable number.

1378061677 is a deficient number, since it is larger than the sum of its proper divisors (158579).

1378061677 is an equidigital number, since it uses as much as digits as its factorization.

1378061677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158578.

The product of its (nonzero) digits is 296352, while the sum is 46.

The square root of 1378061677 is about 37122.2531239686. The cubic root of 1378061677 is about 1112.8147799568.

It can be divided in two parts, 13780 and 61677, that added together give a palindrome (75457).

The spelling of 1378061677 in words is "one billion, three hundred seventy-eight million, sixty-one thousand, six hundred seventy-seven".