235745434761989 has 2 divisors, whose sum is σ = 235745434761990. Its totient is φ = 235745434761988.

The previous prime is 235745434761943. The next prime is 235745434762067. The reversal of 235745434761989 is 989167434547532.

235745434761989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 228242448213025 + 7502986548964 = 15107695^2 + 2739158^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-235745434761989 is a prime.

It is a super-2 number, since 2×235745434761989² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (235745434761289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 117872717380994 + 117872717380995.

It is an arithmetic number, because the mean of its divisors is an integer number (117872717380995).

Almost surely, 2^{235745434761989} is an apocalyptic number.

It is an amenable number.

235745434761989 is a deficient number, since it is larger than the sum of its proper divisors (1).

235745434761989 is an equidigital number, since it uses as much as digits as its factorization.

235745434761989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5486745600, while the sum is 77.

The spelling of 235745434761989 in words is "two hundred thirty-five trillion, seven hundred forty-five billion, four hundred thirty-four million, seven hundred sixty-one thousand, nine hundred eighty-nine".