254156993 has 4 divisors (see below), whose sum is σ = 256532400. Its totient is φ = 251781588.

The previous prime is 254156971. The next prime is 254157017. The reversal of 254156993 is 399651452.

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 a cyclic number.

It is not a de Polignac number, because 254156993 - 2²⁶ = 187048129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (254156933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1187543 + ... + 1187756.

It is an arithmetic number, because the mean of its divisors is an integer number (64133100).

Almost surely, 2^254156993 is an apocalyptic number.

It is an amenable number.

254156993 is a deficient number, since it is larger than the sum of its proper divisors (2375407).

254156993 is a wasteful number, since it uses less digits than its factorization.

254156993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2375406.

The product of its digits is 291600, while the sum is 44.

The square root of 254156993 is about 15942.3019981432. The cubic root of 254156993 is about 633.4330040427.

The spelling of 254156993 in words is "two hundred fifty-four million, one hundred fifty-six thousand, nine hundred ninety-three".