68154993 has 8 divisors (see below), whose sum is σ = 100970400. Its totient is φ = 45436644.

The previous prime is 68154973. The next prime is 68155001. The reversal of 68154993 is 39945186.

It is a happy number.

It is not a de Polignac number, because 68154993 - 2²⁵ = 34600561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68154953) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1262103 + ... + 1262156.

It is an arithmetic number, because the mean of its divisors is an integer number (12621300).

Almost surely, 2^68154993 is an apocalyptic number.

It is an amenable number.

68154993 is a deficient number, since it is larger than the sum of its proper divisors (32815407).

68154993 is a wasteful number, since it uses less digits than its factorization.

68154993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2524268 (or 2524262 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 68154993 is about 8255.6037332227. The cubic root of 68154993 is about 408.4753866258.

The spelling of 68154993 in words is "sixty-eight million, one hundred fifty-four thousand, nine hundred ninety-three".