68453731 has 4 divisors (see below), whose sum is σ = 68651352. Its totient is φ = 68256112.

The previous prime is 68453719. The next prime is 68453741. The reversal of 68453731 is 13735486.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13735486 = 2 ⋅6867743.

It is a cyclic number.

It is not a de Polignac number, because 68453731 - 2⁷ = 68453603 is a prime.

It is a super-2 number, since 2×68453731² = 9371826575640722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68453711) 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, 98290 + ... + 98983.

It is an arithmetic number, because the mean of its divisors is an integer number (17162838).

Almost surely, 2^68453731 is an apocalyptic number.

68453731 is a deficient number, since it is larger than the sum of its proper divisors (197621).

68453731 is a wasteful number, since it uses less digits than its factorization.

68453731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197620.

The product of its digits is 60480, while the sum is 37.

The square root of 68453731 is about 8273.6769939369. The cubic root of 68453731 is about 409.0713285967.

The spelling of 68453731 in words is "sixty-eight million, four hundred fifty-three thousand, seven hundred thirty-one".