68998951 has 16 divisors (see below), whose sum is σ = 80870400. Its totient is φ = 57646368.

The previous prime is 68998949. The next prime is 68998957. The reversal of 68998951 is 15989986.

It is a cyclic number.

It is not a de Polignac number, because 68998951 - 2¹ = 68998949 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68998892 and 68998901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68998957) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65890 + ... + 66928.

It is an arithmetic number, because the mean of its divisors is an integer number (5054400).

Almost surely, 2^68998951 is an apocalyptic number.

68998951 is a deficient number, since it is larger than the sum of its proper divisors (11871449).

68998951 is a wasteful number, since it uses less digits than its factorization.

68998951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1278.

The product of its digits is 1399680, while the sum is 55.

The square root of 68998951 is about 8306.5607202981. The cubic root of 68998951 is about 410.1545144367.

The spelling of 68998951 in words is "sixty-eight million, nine hundred ninety-eight thousand, nine hundred fifty-one".