252778087 has 2 divisors, whose sum is σ = 252778088. Its totient is φ = 252778086.

The previous prime is 252778063. The next prime is 252778103. The reversal of 252778087 is 780877252.

252778087 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-252778087 is a prime.

It is a super-2 number, since 2×252778087² = 127793522534759138, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (252778187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126389043 + 126389044.

It is an arithmetic number, because the mean of its divisors is an integer number (126389044).

Almost surely, 2^252778087 is an apocalyptic number.

252778087 is a deficient number, since it is larger than the sum of its proper divisors (1).

252778087 is an equidigital number, since it uses as much as digits as its factorization.

252778087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 439040, while the sum is 46.

The square root of 252778087 is about 15898.9964148685. The cubic root of 252778087 is about 632.2853814173.

The spelling of 252778087 in words is "two hundred fifty-two million, seven hundred seventy-eight thousand, eighty-seven".