1309666477 has 8 divisors (see below), whose sum is σ = 1548374400. Its totient is φ = 1083861744.

The previous prime is 1309666471. The next prime is 1309666481. The reversal of 1309666477 is 7746669031.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1309666477 - 2³ = 1309666469 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1309666477.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1309666471) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3225577 + ... + 3225982.

It is an arithmetic number, because the mean of its divisors is an integer number (193546800).

Almost surely, 2^1309666477 is an apocalyptic number.

It is an amenable number.

1309666477 is a deficient number, since it is larger than the sum of its proper divisors (238707923).

1309666477 is an equidigital number, since it uses as much as digits as its factorization.

1309666477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6451595.

The product of its (nonzero) digits is 1143072, while the sum is 49.

The square root of 1309666477 is about 36189.3144035639. The cubic root of 1309666477 is about 1094.0913145529.

The spelling of 1309666477 in words is "one billion, three hundred nine million, six hundred sixty-six thousand, four hundred seventy-seven".