14985431977 has 2 divisors, whose sum is σ = 14985431978. Its totient is φ = 14985431976.

The previous prime is 14985431971. The next prime is 14985432061. The reversal of 14985431977 is 77913458941.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9048575376 + 5936856601 = 95124^2 + 77051^2 .

It is an emirp because it is prime and its reverse (77913458941) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 14985431977 - 2²³ = 14977043369 is a prime.

It is not a weakly prime, because it can be changed into another prime (14985431971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7492715988 + 7492715989.

It is an arithmetic number, because the mean of its divisors is an integer number (7492715989).

Almost surely, 2^14985431977 is an apocalyptic number.

It is an amenable number.

14985431977 is a deficient number, since it is larger than the sum of its proper divisors (1).

14985431977 is an equidigital number, since it uses as much as digits as its factorization.

14985431977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7620480, while the sum is 58.

The spelling of 14985431977 in words is "fourteen billion, nine hundred eighty-five million, four hundred thirty-one thousand, nine hundred seventy-seven".