245689951 has 8 divisors (see below), whose sum is σ = 265455344. Its totient is φ = 226048320.

The previous prime is 245689937. The next prime is 245689987. The reversal of 245689951 is 159986542.

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

It is a 7-Lehmer number, since φ(245689951) divides (245689951-1)⁷.

It is a cyclic number.

It is not a de Polignac number, because 245689951 - 2⁹ = 245689439 is a prime.

It is the 15675-th Hogben number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 245689895 and 245689904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245689991) by changing a digit.

It is a nontrivial repunit in base 15674.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26790 + ... + 34771.

It is an arithmetic number, because the mean of its divisors is an integer number (33181918).

Almost surely, 2^245689951 is an apocalyptic number.

245689951 is a deficient number, since it is larger than the sum of its proper divisors (19765393).

245689951 is a wasteful number, since it uses less digits than its factorization.

245689951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61881.

The product of its digits is 777600, while the sum is 49.

The square root of 245689951 is about 15674.5000239242. The cubic root of 245689951 is about 626.3193046568.

The spelling of 245689951 in words is "two hundred forty-five million, six hundred eighty-nine thousand, nine hundred fifty-one".