68421951 has 24 divisors (see below), whose sum is σ = 107905616. Its totient is φ = 41523840.

The previous prime is 68421943. The next prime is 68421959. The reversal of 68421951 is 15912486.

It is an interprime number because it is at equal distance from previous prime (68421943) and next prime (68421959).

It is not a de Polignac number, because 68421951 - 2³ = 68421943 is a prime.

68421951 is a modest number, since divided by 21951 gives 684 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68421959) 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 23 ways as a sum of consecutive naturals, for example, 4536 + ... + 12546.

Almost surely, 2^68421951 is an apocalyptic number.

68421951 is a deficient number, since it is larger than the sum of its proper divisors (39483665).

68421951 is a wasteful number, since it uses less digits than its factorization.

68421951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8103 (or 8100 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 68421951 is about 8271.7562222300. The cubic root of 68421951 is about 409.0080143017.

The spelling of 68421951 in words is "sixty-eight million, four hundred twenty-one thousand, nine hundred fifty-one".