1235677897 has 2 divisors, whose sum is σ = 1235677898. Its totient is φ = 1235677896.

The previous prime is 1235677889. The next prime is 1235677903. The reversal of 1235677897 is 7987765321.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1084977721 + 150700176 = 32939^2 + 12276^2 .

It is a cyclic number.

It is not a de Polignac number, because 1235677897 - 2³ = 1235677889 is a prime.

It is not a weakly prime, because it can be changed into another prime (1235677867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 617838948 + 617838949.

It is an arithmetic number, because the mean of its divisors is an integer number (617838949).

Almost surely, 2^1235677897 is an apocalyptic number.

It is an amenable number.

1235677897 is a deficient number, since it is larger than the sum of its proper divisors (1).

1235677897 is an equidigital number, since it uses as much as digits as its factorization.

1235677897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4445280, while the sum is 55.

The square root of 1235677897 is about 35152.2104141404. The cubic root of 1235677897 is about 1073.0873933266.

The spelling of 1235677897 in words is "one billion, two hundred thirty-five million, six hundred seventy-seven thousand, eight hundred ninety-seven".