172435783901 has 2 divisors, whose sum is σ = 172435783902. Its totient is φ = 172435783900.

The previous prime is 172435783853. The next prime is 172435783913. The reversal of 172435783901 is 109387534271.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 149016072676 + 23419711225 = 386026^2 + 153035^2 .

It is an emirp because it is prime and its reverse (109387534271) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 172435783901 - 2⁶ = 172435783837 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 172435783901.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172435783301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86217891950 + 86217891951.

It is an arithmetic number, because the mean of its divisors is an integer number (86217891951).

Almost surely, 2^172435783901 is an apocalyptic number.

It is an amenable number.

172435783901 is a deficient number, since it is larger than the sum of its proper divisors (1).

172435783901 is an equidigital number, since it uses as much as digits as its factorization.

172435783901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1270080, while the sum is 50.

The spelling of 172435783901 in words is "one hundred seventy-two billion, four hundred thirty-five million, seven hundred eighty-three thousand, nine hundred one".