253045649 has 4 divisors (see below), whose sum is σ = 254721600. Its totient is φ = 251369700.

The previous prime is 253045643. The next prime is 253045651. The reversal of 253045649 is 946540352.

253045649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 253045649 - 2⁸ = 253045393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (253045643) 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, 837749 + ... + 838050.

It is an arithmetic number, because the mean of its divisors is an integer number (63680400).

Almost surely, 2^253045649 is an apocalyptic number.

It is an amenable number.

253045649 is a deficient number, since it is larger than the sum of its proper divisors (1675951).

253045649 is a wasteful number, since it uses less digits than its factorization.

253045649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1675950.

The product of its (nonzero) digits is 129600, while the sum is 38.

The square root of 253045649 is about 15907.4086198853. The cubic root of 253045649 is about 632.5083911045.

The spelling of 253045649 in words is "two hundred fifty-three million, forty-five thousand, six hundred forty-nine".