245399933 has 2 divisors, whose sum is σ = 245399934. Its totient is φ = 245399932.

The previous prime is 245399897. The next prime is 245399951. The reversal of 245399933 is 339993542.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 172843609 + 72556324 = 13147^2 + 8518^2 .

It is a cyclic number.

It is not a de Polignac number, because 245399933 - 2⁸ = 245399677 is a prime.

It is a super-2 number, since 2×245399933² = 120442254232808978, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (245399993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122699966 + 122699967.

It is an arithmetic number, because the mean of its divisors is an integer number (122699967).

Almost surely, 2^245399933 is an apocalyptic number.

It is an amenable number.

245399933 is a deficient number, since it is larger than the sum of its proper divisors (1).

245399933 is an equidigital number, since it uses as much as digits as its factorization.

245399933 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 787320, while the sum is 47.

The square root of 245399933 is about 15665.2460242410. The cubic root of 245399933 is about 626.0727671130.

The spelling of 245399933 in words is "two hundred forty-five million, three hundred ninety-nine thousand, nine hundred thirty-three".