1309662157 has 8 divisors (see below), whose sum is σ = 1313841312. Its totient is φ = 1305490800.

The previous prime is 1309662149. The next prime is 1309662169. The reversal of 1309662157 is 7512669031.

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

It is a cyclic number.

It is not a de Polignac number, because 1309662157 - 2³ = 1309662149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1309665157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 551182 + ... + 553552.

It is an arithmetic number, because the mean of its divisors is an integer number (164230164).

Almost surely, 2^1309662157 is an apocalyptic number.

It is an amenable number.

1309662157 is a deficient number, since it is larger than the sum of its proper divisors (4179155).

1309662157 is an equidigital number, since it uses as much as digits as its factorization.

1309662157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3899.

The product of its (nonzero) digits is 68040, while the sum is 40.

The square root of 1309662157 is about 36189.2547173881. The cubic root of 1309662157 is about 1094.0901115801.

The spelling of 1309662157 in words is "one billion, three hundred nine million, six hundred sixty-two thousand, one hundred fifty-seven".