249274777 has 2 divisors, whose sum is σ = 249274778. Its totient is φ = 249274776.

The previous prime is 249274687. The next prime is 249274799. The reversal of 249274777 is 777472942.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 216796176 + 32478601 = 14724^2 + 5699^2 .

It is a cyclic number.

It is not a de Polignac number, because 249274777 - 2¹⁵ = 249242009 is a prime.

It is a super-4 number, since 4×249274777⁴ (a number of 35 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 249274777.

It is not a weakly prime, because it can be changed into another prime (249274477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124637388 + 124637389.

It is an arithmetic number, because the mean of its divisors is an integer number (124637389).

Almost surely, 2^249274777 is an apocalyptic number.

It is an amenable number.

249274777 is a deficient number, since it is larger than the sum of its proper divisors (1).

249274777 is an equidigital number, since it uses as much as digits as its factorization.

249274777 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1382976, while the sum is 49.

The square root of 249274777 is about 15788.4380798102. The cubic root of 249274777 is about 629.3507858220.

The spelling of 249274777 in words is "two hundred forty-nine million, two hundred seventy-four thousand, seven hundred seventy-seven".