235291997 has 2 divisors, whose sum is σ = 235291998. Its totient is φ = 235291996.

The previous prime is 235291957. The next prime is 235292003. The reversal of 235291997 is 799192532.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 145781476 + 89510521 = 12074^2 + 9461^2 .

It is a cyclic number.

It is not a de Polignac number, because 235291997 - 2⁶ = 235291933 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (235291957) 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, 117645998 + 117645999.

It is an arithmetic number, because the mean of its divisors is an integer number (117645999).

Almost surely, 2^235291997 is an apocalyptic number.

It is an amenable number.

235291997 is a deficient number, since it is larger than the sum of its proper divisors (1).

235291997 is an equidigital number, since it uses as much as digits as its factorization.

235291997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 306180, while the sum is 47.

The square root of 235291997 is about 15339.2306521546. The cubic root of 235291997 is about 617.3560642955.

It can be divided in two parts, 2352 and 91997, that added together give a palindrome (94349).

The spelling of 235291997 in words is "two hundred thirty-five million, two hundred ninety-one thousand, nine hundred ninety-seven".