1309812212 has 24 divisors (see below), whose sum is σ = 2328725280. Its totient is φ = 644482080.

The previous prime is 1309812197. The next prime is 1309812223. The reversal of 1309812212 is 2122189031.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 368339 + ... + 371877.

It is an arithmetic number, because the mean of its divisors is an integer number (97030220).

Almost surely, 2^1309812212 is an apocalyptic number.

It is an amenable number.

1309812212 is a deficient number, since it is larger than the sum of its proper divisors (1018913068).

1309812212 is a wasteful number, since it uses less digits than its factorization.

1309812212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4991 (or 4989 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 1309812212 is about 36191.3278562697. The cubic root of 1309812212 is about 1094.1318952368.

The spelling of 1309812212 in words is "one billion, three hundred nine million, eight hundred twelve thousand, two hundred twelve".