257970009 has 16 divisors (see below), whose sum is σ = 376104960. Its totient is φ = 155980560.

The previous prime is 257969969. The next prime is 257970023. The reversal of 257970009 is 900079752.

It is not a de Polignac number, because 257970009 - 2¹² = 257965913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (257970079) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5584 + ... + 23390.

It is an arithmetic number, because the mean of its divisors is an integer number (23506560).

Almost surely, 2^257970009 is an apocalyptic number.

It is an amenable number.

257970009 is a deficient number, since it is larger than the sum of its proper divisors (118134951).

257970009 is a wasteful number, since it uses less digits than its factorization.

257970009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18260.

The product of its (nonzero) digits is 39690, while the sum is 39.

The square root of 257970009 is about 16061.4447980249. Note that the first 3 decimals coincide. The cubic root of 257970009 is about 636.5850076946.

The spelling of 257970009 in words is "two hundred fifty-seven million, nine hundred seventy thousand, nine".