257949061 has 4 divisors (see below), whose sum is σ = 258366400. Its totient is φ = 257531724.

The previous prime is 257949059. The next prime is 257949067. The reversal of 257949061 is 160949752.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 257949061 - 2¹ = 257949059 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 257948999 and 257949017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257949067) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 207741 + ... + 208978.

It is an arithmetic number, because the mean of its divisors is an integer number (64591600).

Almost surely, 2^257949061 is an apocalyptic number.

It is an amenable number.

257949061 is a deficient number, since it is larger than the sum of its proper divisors (417339).

257949061 is an equidigital number, since it uses as much as digits as its factorization.

257949061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417338.

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 257949061 is about 16060.7926641246. The cubic root of 257949061 is about 636.5677763069.

The spelling of 257949061 in words is "two hundred fifty-seven million, nine hundred forty-nine thousand, sixty-one".