245667749 has 4 divisors (see below), whose sum is σ = 245999136. Its totient is φ = 245336364.

The previous prime is 245667743. The next prime is 245667757. The reversal of 245667749 is 947766542.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-245667749 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 245667697 and 245667706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245667743) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164579 + ... + 166064.

It is an arithmetic number, because the mean of its divisors is an integer number (61499784).

Almost surely, 2^245667749 is an apocalyptic number.

It is an amenable number.

245667749 is a deficient number, since it is larger than the sum of its proper divisors (331387).

245667749 is an equidigital number, since it uses as much as digits as its factorization.

245667749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331386.

The product of its digits is 2540160, while the sum is 50.

The square root of 245667749 is about 15673.7917875669. The cubic root of 245667749 is about 626.3004381138.

The spelling of 245667749 in words is "two hundred forty-five million, six hundred sixty-seven thousand, seven hundred forty-nine".