1377613 has 4 divisors (see below), whose sum is σ = 1397088. Its totient is φ = 1358140.

The previous prime is 1377601. The next prime is 1377637. The reversal of 1377613 is 3167731.

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, and also an emirpimes, since its reverse is a distinct semiprime: 3167731 = 7 ⋅452533.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1377613 is a prime.

It is a Duffinian number.

1377613 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1377643) 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, 9631 + ... + 9772.

It is an arithmetic number, because the mean of its divisors is an integer number (349272).

2^1377613 is an apocalyptic number.

It is an amenable number.

1377613 is a deficient number, since it is larger than the sum of its proper divisors (19475).

1377613 is an equidigital number, since it uses as much as digits as its factorization.

1377613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19474.

The product of its digits is 2646, while the sum is 28.

The square root of 1377613 is about 1173.7175980618. The cubic root of 1377613 is about 111.2693994702.

It can be divided in two parts, 137 and 7613, that added together give a triangular number (7750 = T₁₂₄).

The spelling of 1377613 in words is "one million, three hundred seventy-seven thousand, six hundred thirteen".