1235231069 has 2 divisors, whose sum is σ = 1235231070. Its totient is φ = 1235231068.

The previous prime is 1235231047. The next prime is 1235231071. The reversal of 1235231069 is 9601325321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1075512025 + 159719044 = 32795^2 + 12638^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1235231069 is a prime.

It is a super-2 number, since 2×1235231069² = 3051591587645765522, which contains 22 as substring.

Together with 1235231071, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1235231269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 617615534 + 617615535.

It is an arithmetic number, because the mean of its divisors is an integer number (617615535).

Almost surely, 2^1235231069 is an apocalyptic number.

It is an amenable number.

1235231069 is a deficient number, since it is larger than the sum of its proper divisors (1).

1235231069 is an equidigital number, since it uses as much as digits as its factorization.

1235231069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 1235231069 is about 35145.8542220843. The cubic root of 1235231069 is about 1072.9580329430.

The spelling of 1235231069 in words is "one billion, two hundred thirty-five million, two hundred thirty-one thousand, sixty-nine".