1377699345 has 72 divisors (see below), whose sum is σ = 2635452456. Its totient is φ = 665280000.

The previous prime is 1377699341. The next prime is 1377699347. The reversal of 1377699345 is 5439967731.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 31102929 + 1346596416 = 5577^2 + 36696^2 .

It is not a de Polignac number, because 1377699345 - 2² = 1377699341 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1377699291 and 1377699300.

It is not an unprimeable number, because it can be changed into a prime (1377699341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2292045 + ... + 2292645.

Almost surely, 2^1377699345 is an apocalyptic number.

1377699345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1377699345 is a deficient number, since it is larger than the sum of its proper divisors (1257753111).

1377699345 is a wasteful number, since it uses less digits than its factorization.

1377699345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1055 (or 1041 counting only the distinct ones).

The product of its digits is 4286520, while the sum is 54.

The square root of 1377699345 is about 37117.3725497913. The cubic root of 1377699345 is about 1112.7172410839.

The spelling of 1377699345 in words is "one billion, three hundred seventy-seven million, six hundred ninety-nine thousand, three hundred forty-five".