39545969 has 2 divisors, whose sum is σ = 39545970. Its totient is φ = 39545968.

The previous prime is 39545953. The next prime is 39545971. The reversal of 39545969 is 96954593.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39526369 + 19600 = 6287^2 + 140^2 .

It is an emirp because it is prime and its reverse (96954593) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39545969 - 2⁴ = 39545953 is a prime.

It is a super-2 number, since 2×39545969² = 3127767328297922, which contains 22 as substring.

Together with 39545971, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (39545929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19772984 + 19772985.

It is an arithmetic number, because the mean of its divisors is an integer number (19772985).

Almost surely, 2^39545969 is an apocalyptic number.

It is an amenable number.

39545969 is a deficient number, since it is larger than the sum of its proper divisors (1).

39545969 is an equidigital number, since it uses as much as digits as its factorization.

39545969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1312200, while the sum is 50.

The square root of 39545969 is about 6288.5585788796. The cubic root of 39545969 is about 340.6962922235.

It can be divided in two parts, 395 and 45969, that added together give a palindrome (46364).

The spelling of 39545969 in words is "thirty-nine million, five hundred forty-five thousand, nine hundred sixty-nine".