249869101 has 2 divisors, whose sum is σ = 249869102. Its totient is φ = 249869100.

The previous prime is 249869089. The next prime is 249869117. The reversal of 249869101 is 101968942.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 134328100 + 115541001 = 11590^2 + 10749^2 .

It is a cyclic number.

It is not a de Polignac number, because 249869101 - 2²¹ = 247771949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (249869131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124934550 + 124934551.

It is an arithmetic number, because the mean of its divisors is an integer number (124934551).

Almost surely, 2^249869101 is an apocalyptic number.

It is an amenable number.

249869101 is a deficient number, since it is larger than the sum of its proper divisors (1).

249869101 is an equidigital number, since it uses as much as digits as its factorization.

249869101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 249869101 is about 15807.2483690236. The cubic root of 249869101 is about 629.8505574820.

The spelling of 249869101 in words is "two hundred forty-nine million, eight hundred sixty-nine thousand, one hundred one".