253473994 has 4 divisors (see below), whose sum is σ = 380210994. Its totient is φ = 126736996.

The previous prime is 253473991. The next prime is 253474027. The reversal of 253473994 is 499374352.

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

It can be written as a sum of positive squares in only one way, i.e., 241398369 + 12075625 = 15537^2 + 3475^2 .

It is not an unprimeable number, because it can be changed into a prime (253473991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63368497 + ... + 63368500.

Almost surely, 2^253473994 is an apocalyptic number.

253473994 is a deficient number, since it is larger than the sum of its proper divisors (126737000).

253473994 is a wasteful number, since it uses less digits than its factorization.

253473994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126736999.

The product of its digits is 816480, while the sum is 46.

The square root of 253473994 is about 15920.8666221409. The cubic root of 253473994 is about 632.8650844225.

The spelling of 253473994 in words is "two hundred fifty-three million, four hundred seventy-three thousand, nine hundred ninety-four".