98645257 has 4 divisors (see below), whose sum is σ = 98822916. Its totient is φ = 98467600.

The previous prime is 98645249. The next prime is 98645273. The reversal of 98645257 is 75254689.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12823561 + 85821696 = 3581^2 + 9264^2 .

It is a cyclic number.

It is not a de Polignac number, because 98645257 - 2³ = 98645249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (98640257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87994 + ... + 89107.

It is an arithmetic number, because the mean of its divisors is an integer number (24705729).

Almost surely, 2^98645257 is an apocalyptic number.

It is an amenable number.

98645257 is a deficient number, since it is larger than the sum of its proper divisors (177659).

98645257 is a wasteful number, since it uses less digits than its factorization.

98645257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177658.

The product of its digits is 604800, while the sum is 46.

The square root of 98645257 is about 9932.0318666424. The cubic root of 98645257 is about 462.0532927660.

The spelling of 98645257 in words is "ninety-eight million, six hundred forty-five thousand, two hundred fifty-seven".