68428937 has 4 divisors (see below), whose sum is σ = 72030480. Its totient is φ = 64827396.

The previous prime is 68428903. The next prime is 68428949. The reversal of 68428937 is 73982486.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 73982486 = 2 ⋅36991243.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68428937 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68428891 and 68428900.

It is not an unprimeable number, because it can be changed into a prime (68428957) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1800743 + ... + 1800780.

It is an arithmetic number, because the mean of its divisors is an integer number (18007620).

Almost surely, 2^68428937 is an apocalyptic number.

It is an amenable number.

68428937 is a deficient number, since it is larger than the sum of its proper divisors (3601543).

68428937 is a wasteful number, since it uses less digits than its factorization.

68428937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3601542.

The product of its digits is 580608, while the sum is 47.

The square root of 68428937 is about 8272.1784917880. The cubic root of 68428937 is about 409.0219339707.

The spelling of 68428937 in words is "sixty-eight million, four hundred twenty-eight thousand, nine hundred thirty-seven".