1309623101 has 8 divisors (see below), whose sum is σ = 1393702200. Its totient is φ = 1226326528.

The previous prime is 1309623079. The next prime is 1309623121. The reversal of 1309623101 is 1013269031.

It can be written as a sum of positive squares in 4 ways, for example, as 689115001 + 620508100 = 26251^2 + 24910^2 .

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 1309623101 - 2¹⁴ = 1309606717 is a prime.

It is a super-2 number, since 2×1309623101² = 3430225333345712402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1309623121) 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, 192176 + ... + 198873.

It is an arithmetic number, because the mean of its divisors is an integer number (174212775).

Almost surely, 2^1309623101 is an apocalyptic number.

It is an amenable number.

1309623101 is a deficient number, since it is larger than the sum of its proper divisors (84079099).

1309623101 is a wasteful number, since it uses less digits than its factorization.

1309623101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391263.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 1309623101 is about 36188.7151056790. The cubic root of 1309623101 is about 1094.0792356943.

The spelling of 1309623101 in words is "one billion, three hundred nine million, six hundred twenty-three thousand, one hundred one".