1235653157 has 2 divisors, whose sum is σ = 1235653158. Its totient is φ = 1235653156.

The previous prime is 1235653091. The next prime is 1235653169. The reversal of 1235653157 is 7513565321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1232992996 + 2660161 = 35114^2 + 1631^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1235653157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1235653157.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1235653057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 617826578 + 617826579.

It is an arithmetic number, because the mean of its divisors is an integer number (617826579).

Almost surely, 2^1235653157 is an apocalyptic number.

It is an amenable number.

1235653157 is a deficient number, since it is larger than the sum of its proper divisors (1).

1235653157 is an equidigital number, since it uses as much as digits as its factorization.

1235653157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 94500, while the sum is 38.

The square root of 1235653157 is about 35151.8585141668. The cubic root of 1235653157 is about 1073.0802317086.

The spelling of 1235653157 in words is "one billion, two hundred thirty-five million, six hundred fifty-three thousand, one hundred fifty-seven".