245139967 has 2 divisors, whose sum is σ = 245139968. Its totient is φ = 245139966.

The previous prime is 245139959. The next prime is 245140013. The reversal of 245139967 is 769931542.

It is a happy number.

It is an a-pointer prime, because the next prime (245140013) can be obtained adding 245139967 to its sum of digits (46).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 245139967 - 2³ = 245139959 is a prime.

It is a super-4 number, since 4×245139967⁴ (a number of 35 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (245131967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122569983 + 122569984.

It is an arithmetic number, because the mean of its divisors is an integer number (122569984).

Almost surely, 2^245139967 is an apocalyptic number.

245139967 is a deficient number, since it is larger than the sum of its proper divisors (1).

245139967 is an equidigital number, since it uses as much as digits as its factorization.

245139967 is an evil number, because the sum of its binary digits is even.

The product of its digits is 408240, while the sum is 46.

The square root of 245139967 is about 15656.9462859141. The cubic root of 245139967 is about 625.8516109271.

The spelling of 245139967 in words is "two hundred forty-five million, one hundred thirty-nine thousand, nine hundred sixty-seven".