1209950831 has 8 divisors (see below), whose sum is σ = 1227904128. Its totient is φ = 1192023000.

The previous prime is 1209950821. The next prime is 1209950851. The reversal of 1209950831 is 1380599021.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1209950831 is a prime.

It is a super-2 number, since 2×1209950831² = 2927962026875181122, 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 (1209950821) 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, 103136 + ... + 114266.

It is an arithmetic number, because the mean of its divisors is an integer number (153488016).

Almost surely, 2^1209950831 is an apocalyptic number.

1209950831 is a deficient number, since it is larger than the sum of its proper divisors (17953297).

1209950831 is a wasteful number, since it uses less digits than its factorization.

1209950831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12733.

The product of its (nonzero) digits is 19440, while the sum is 38.

The square root of 1209950831 is about 34784.3474999891. The cubic root of 1209950831 is about 1065.5878027980.

The spelling of 1209950831 in words is "one billion, two hundred nine million, nine hundred fifty thousand, eight hundred thirty-one".