249556061 has 2 divisors, whose sum is σ = 249556062. Its totient is φ = 249556060.

The previous prime is 249556037. The next prime is 249556081. The reversal of 249556061 is 160655942.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 249450436 + 105625 = 15794^2 + 325^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-249556061 is a prime.

It is a Chen prime.

It is equal to p_13656368 and since 249556061 and 13656368 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (249556081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124778030 + 124778031.

It is an arithmetic number, because the mean of its divisors is an integer number (124778031).

Almost surely, 2^249556061 is an apocalyptic number.

It is an amenable number.

249556061 is a deficient number, since it is larger than the sum of its proper divisors (1).

249556061 is an equidigital number, since it uses as much as digits as its factorization.

249556061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64800, while the sum is 38.

The square root of 249556061 is about 15797.3434792056. The cubic root of 249556061 is about 629.5874186176.

The spelling of 249556061 in words is "two hundred forty-nine million, five hundred fifty-six thousand, sixty-one".