1306992377 has 4 divisors (see below), whose sum is σ = 1307154420. Its totient is φ = 1306830336.

The previous prime is 1306992341. The next prime is 1306992437. The reversal of 1306992377 is 7732996031.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7732996031 = 43 ⋅179837117.

It can be written as a sum of positive squares in 2 ways, for example, as 1120642576 + 186349801 = 33476^2 + 13651^2 .

It is a cyclic number.

It is not a de Polignac number, because 1306992377 - 2¹² = 1306988281 is a prime.

It is a super-2 number, since 2×1306992377² = 3416458147072220258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1306992877) 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, 68252 + ... + 85277.

It is an arithmetic number, because the mean of its divisors is an integer number (326788605).

Almost surely, 2^1306992377 is an apocalyptic number.

It is an amenable number.

1306992377 is a deficient number, since it is larger than the sum of its proper divisors (162043).

1306992377 is an equidigital number, since it uses as much as digits as its factorization.

1306992377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162042.

The product of its (nonzero) digits is 428652, while the sum is 47.

The square root of 1306992377 is about 36152.3495363718. The cubic root of 1306992377 is about 1093.3461622177.

The spelling of 1306992377 in words is "one billion, three hundred six million, nine hundred ninety-two thousand, three hundred seventy-seven".