1213025969 has 2 divisors, whose sum is σ = 1213025970. Its totient is φ = 1213025968.

The previous prime is 1213025941. The next prime is 1213025971. The reversal of 1213025969 is 9695203121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 698280625 + 514745344 = 26425^2 + 22688^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1213025969 is a prime.

It is a super-2 number, since 2×1213025969² = 2942864002936777922, which contains 22 as substring.

Together with 1213025971, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1213025909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606512984 + 606512985.

It is an arithmetic number, because the mean of its divisors is an integer number (606512985).

Almost surely, 2^1213025969 is an apocalyptic number.

It is an amenable number.

1213025969 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213025969 is an equidigital number, since it uses as much as digits as its factorization.

1213025969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29160, while the sum is 38.

The square root of 1213025969 is about 34828.5223487876. The cubic root of 1213025969 is about 1066.4897836361.

The spelling of 1213025969 in words is "one billion, two hundred thirteen million, twenty-five thousand, nine hundred sixty-nine".