68762921 has 8 divisors (see below), whose sum is σ = 70588488. Its totient is φ = 66960000.

The previous prime is 68762917. The next prime is 68762951. The reversal of 68762921 is 12926786.

It can be written as a sum of positive squares in 4 ways, for example, as 287296 + 68475625 = 536^2 + 8275^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 68762921 - 2² = 68762917 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68762951) 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, 581 + ... + 11741.

It is an arithmetic number, because the mean of its divisors is an integer number (8823561).

Almost surely, 2^68762921 is an apocalyptic number.

68762921 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

68762921 is a deficient number, since it is larger than the sum of its proper divisors (1825567).

68762921 is a wasteful number, since it uses less digits than its factorization.

68762921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11323.

The product of its digits is 72576, while the sum is 41.

The square root of 68762921 is about 8292.3411048991. The cubic root of 68762921 is about 409.6862978142.

The spelling of 68762921 in words is "sixty-eight million, seven hundred sixty-two thousand, nine hundred twenty-one".