258750749 has 2 divisors, whose sum is σ = 258750750. Its totient is φ = 258750748.

The previous prime is 258750671. The next prime is 258750773. The reversal of 258750749 is 947057852.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 246709849 + 12040900 = 15707^2 + 3470^2 .

It is a cyclic number.

It is not a de Polignac number, because 258750749 - 2¹⁶ = 258685213 is a prime.

It is a super-2 number, since 2×258750749² = 133903900216122002, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (258759749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129375374 + 129375375.

It is an arithmetic number, because the mean of its divisors is an integer number (129375375).

Almost surely, 2^258750749 is an apocalyptic number.

It is an amenable number.

258750749 is a deficient number, since it is larger than the sum of its proper divisors (1).

258750749 is an equidigital number, since it uses as much as digits as its factorization.

258750749 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 705600, while the sum is 47.

The square root of 258750749 is about 16085.7312236653. The cubic root of 258750749 is about 637.2265639599.

The spelling of 258750749 in words is "two hundred fifty-eight million, seven hundred fifty thousand, seven hundred forty-nine".