1306690187 has 16 divisors (see below), whose sum is σ = 1469954304. Its totient is φ = 1151100000.

The previous prime is 1306690181. The next prime is 1306690199. The reversal of 1306690187 is 7810966031.

It is a cyclic number.

It is not a de Polignac number, because 1306690187 - 2⁶ = 1306690123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1306690181) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95762 + ... + 108552.

It is an arithmetic number, because the mean of its divisors is an integer number (91872144).

Almost surely, 2^1306690187 is an apocalyptic number.

1306690187 is a deficient number, since it is larger than the sum of its proper divisors (163264117).

1306690187 is a wasteful number, since it uses less digits than its factorization.

1306690187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13090.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 1306690187 is about 36148.1698983503. The cubic root of 1306690187 is about 1093.2618914523.

The spelling of 1306690187 in words is "one billion, three hundred six million, six hundred ninety thousand, one hundred eighty-seven".