253373761 has 4 divisors (see below), whose sum is σ = 258154452. Its totient is φ = 248593072.

The previous prime is 253373741. The next prime is 253373803. The reversal of 253373761 is 167373352.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 126135361 + 127238400 = 11231^2 + 11280^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-253373761 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 253373761.

It is not an unprimeable number, because it can be changed into a prime (253373741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2390266 + ... + 2390371.

It is an arithmetic number, because the mean of its divisors is an integer number (64538613).

Almost surely, 2^253373761 is an apocalyptic number.

It is an amenable number.

253373761 is a deficient number, since it is larger than the sum of its proper divisors (4780691).

253373761 is an equidigital number, since it uses as much as digits as its factorization.

253373761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4780690.

The product of its digits is 79380, while the sum is 37.

The square root of 253373761 is about 15917.7184608850. The cubic root of 253373761 is about 632.7816539973.

The spelling of 253373761 in words is "two hundred fifty-three million, three hundred seventy-three thousand, seven hundred sixty-one".