1212031957 has 2 divisors, whose sum is σ = 1212031958. Its totient is φ = 1212031956.

The previous prime is 1212031939. The next prime is 1212031967. The reversal of 1212031957 is 7591302121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 682985956 + 529046001 = 26134^2 + 23001^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1212031957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1212031937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606015978 + 606015979.

It is an arithmetic number, because the mean of its divisors is an integer number (606015979).

Almost surely, 2^1212031957 is an apocalyptic number.

It is an amenable number.

1212031957 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212031957 is an equidigital number, since it uses as much as digits as its factorization.

1212031957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3780, while the sum is 31.

The square root of 1212031957 is about 34814.2493384534. The cubic root of 1212031957 is about 1066.1983929683.

The spelling of 1212031957 in words is "one billion, two hundred twelve million, thirty-one thousand, nine hundred fifty-seven".