245399913 has 48 divisors (see below), whose sum is σ = 412776000. Its totient is φ = 138839040.

The previous prime is 245399897. The next prime is 245399933. The reversal of 245399913 is 319993542.

245399913 is a `hidden beast` number, since 24 + 539 + 9 + 91 + 3 = 666.

It is not a de Polignac number, because 245399913 - 2⁴ = 245399897 is a prime.

It is a super-2 number, since 2×245399913² = 120442234600815138, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (245399933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 233413 + ... + 234461.

It is an arithmetic number, because the mean of its divisors is an integer number (8599500).

Almost surely, 2^245399913 is an apocalyptic number.

It is an amenable number.

245399913 is a deficient number, since it is larger than the sum of its proper divisors (167376087).

245399913 is a wasteful number, since it uses less digits than its factorization.

245399913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1222 (or 1219 counting only the distinct ones).

The product of its digits is 262440, while the sum is 45.

The square root of 245399913 is about 15665.2453858853. The cubic root of 245399913 is about 626.0727501048.

The spelling of 245399913 in words is "two hundred forty-five million, three hundred ninety-nine thousand, nine hundred thirteen".