67797891 has 40 divisors (see below), whose sum is σ = 116915040. Its totient is φ = 38351232.

The previous prime is 67797889. The next prime is 67797893. The reversal of 67797891 is 19879776.

It is an interprime number because it is at equal distance from previous prime (67797889) and next prime (67797893).

It is not a de Polignac number, because 67797891 - 2¹ = 67797889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (67797893) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 61255 + ... + 62351.

It is an arithmetic number, because the mean of its divisors is an integer number (2922876).

Almost surely, 2^67797891 is an apocalyptic number.

67797891 is a deficient number, since it is larger than the sum of its proper divisors (49117149).

67797891 is a wasteful number, since it uses less digits than its factorization.

67797891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1225 (or 1216 counting only the distinct ones).

The product of its digits is 1333584, while the sum is 54.

The square root of 67797891 is about 8233.9474737212. The cubic root of 67797891 is about 407.7607269194.

The spelling of 67797891 in words is "sixty-seven million, seven hundred ninety-seven thousand, eight hundred ninety-one".