251772673 has 2 divisors, whose sum is σ = 251772674. Its totient is φ = 251772672.

The previous prime is 251772659. The next prime is 251772713. The reversal of 251772673 is 376277152.

It is a happy number.

It is an a-pointer prime, because the next prime (251772713) can be obtained adding 251772673 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 183412849 + 68359824 = 13543^2 + 8268^2 .

It is a cyclic number.

It is not a de Polignac number, because 251772673 - 2⁵ = 251772641 is a prime.

It is not a weakly prime, because it can be changed into another prime (251772473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125886336 + 125886337.

It is an arithmetic number, because the mean of its divisors is an integer number (125886337).

Almost surely, 2^251772673 is an apocalyptic number.

It is an amenable number.

251772673 is a deficient number, since it is larger than the sum of its proper divisors (1).

251772673 is an equidigital number, since it uses as much as digits as its factorization.

251772673 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 123480, while the sum is 40.

The square root of 251772673 is about 15867.3461234070. The cubic root of 251772673 is about 631.4459715303.

The spelling of 251772673 in words is "two hundred fifty-one million, seven hundred seventy-two thousand, six hundred seventy-three".