245680491 has 16 divisors (see below), whose sum is σ = 379960064. Its totient is φ = 138292704.

The previous prime is 245680483. The next prime is 245680499. The reversal of 245680491 is 194086542.

It is an interprime number because it is at equal distance from previous prime (245680483) and next prime (245680499).

It is not a de Polignac number, because 245680491 - 2³ = 245680483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (245680499) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85900 + ... + 88713.

It is an arithmetic number, because the mean of its divisors is an integer number (23747504).

Almost surely, 2^245680491 is an apocalyptic number.

245680491 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

245680491 is a deficient number, since it is larger than the sum of its proper divisors (134279573).

245680491 is a wasteful number, since it uses less digits than its factorization.

245680491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174690.

The product of its (nonzero) digits is 69120, while the sum is 39.

The square root of 245680491 is about 15674.1982570082. The cubic root of 245680491 is about 626.3112659931.

The spelling of 245680491 in words is "two hundred forty-five million, six hundred eighty thousand, four hundred ninety-one".