258294649 has 2 divisors, whose sum is σ = 258294650. Its totient is φ = 258294648.

The previous prime is 258294613. The next prime is 258294653. The reversal of 258294649 is 946492852.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 254562025 + 3732624 = 15955^2 + 1932^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-258294649 is a prime.

It is a super-2 number, since 2×258294649² = 133432251404066402, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (258294349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129147324 + 129147325.

It is an arithmetic number, because the mean of its divisors is an integer number (129147325).

Almost surely, 2^258294649 is an apocalyptic number.

It is an amenable number.

258294649 is a deficient number, since it is larger than the sum of its proper divisors (1).

258294649 is an equidigital number, since it uses as much as digits as its factorization.

258294649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1244160, while the sum is 49.

The square root of 258294649 is about 16071.5478097164. The cubic root of 258294649 is about 636.8519306185.

The spelling of 258294649 in words is "two hundred fifty-eight million, two hundred ninety-four thousand, six hundred forty-nine".