253983742 has 4 divisors (see below), whose sum is σ = 380975616. Its totient is φ = 126991870.

The previous prime is 253983721. The next prime is 253983749. The reversal of 253983742 is 247389352.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253983749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63495934 + ... + 63495937.

It is an arithmetic number, because the mean of its divisors is an integer number (95243904).

Almost surely, 2^253983742 is an apocalyptic number.

253983742 is a deficient number, since it is larger than the sum of its proper divisors (126991874).

253983742 is a wasteful number, since it uses less digits than its factorization.

253983742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126991873.

The product of its digits is 362880, while the sum is 43.

The square root of 253983742 is about 15936.8673835230. The cubic root of 253983742 is about 633.2890407313.

The spelling of 253983742 in words is "two hundred fifty-three million, nine hundred eighty-three thousand, seven hundred forty-two".