245173989 has 8 divisors (see below), whose sum is σ = 326980800. Its totient is φ = 163408256.

The previous prime is 245173979. The next prime is 245173993. The reversal of 245173989 is 989371542.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 245173989 - 2⁷ = 245173861 is a prime.

It is a super-2 number, since 2×245173989² = 120220569764344242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245173909) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8629 + ... + 23765.

It is an arithmetic number, because the mean of its divisors is an integer number (40872600).

Almost surely, 2^245173989 is an apocalyptic number.

It is an amenable number.

245173989 is a deficient number, since it is larger than the sum of its proper divisors (81806811).

245173989 is a wasteful number, since it uses less digits than its factorization.

245173989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20539.

The product of its digits is 544320, while the sum is 48.

The square root of 245173989 is about 15658.0327308382. The cubic root of 245173989 is about 625.8805627388.

The spelling of 245173989 in words is "two hundred forty-five million, one hundred seventy-three thousand, nine hundred eighty-nine".