901716623989 has 2 divisors, whose sum is σ = 901716623990. Its totient is φ = 901716623988.

The previous prime is 901716623953. The next prime is 901716624019. The reversal of 901716623989 is 989326617109.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 870410629764 + 31305994225 = 932958^2 + 176935^2 .

It is an emirp because it is prime and its reverse (989326617109) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 901716623989 - 2⁹ = 901716623477 is a prime.

It is a super-2 number, since 2×901716623989² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (901716623789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 450858311994 + 450858311995.

It is an arithmetic number, because the mean of its divisors is an integer number (450858311995).

Almost surely, 2^901716623989 is an apocalyptic number.

It is an amenable number.

901716623989 is a deficient number, since it is larger than the sum of its proper divisors (1).

901716623989 is an equidigital number, since it uses as much as digits as its factorization.

901716623989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8817984, while the sum is 61.

The spelling of 901716623989 in words is "nine hundred one billion, seven hundred sixteen million, six hundred twenty-three thousand, nine hundred eighty-nine".