68367631 has 4 divisors (see below), whose sum is σ = 68640264. Its totient is φ = 68095000.

The previous prime is 68367583. The next prime is 68367701. The reversal of 68367631 is 13676386.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13676386 = 2 ⋅6838193.

It is a cyclic number.

It is not a de Polignac number, because 68367631 - 2¹⁷ = 68236559 is a prime.

It is a super-2 number, since 2×68367631² = 9348265937104322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68362631) 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, 135940 + ... + 136441.

It is an arithmetic number, because the mean of its divisors is an integer number (17160066).

Almost surely, 2^68367631 is an apocalyptic number.

68367631 is a deficient number, since it is larger than the sum of its proper divisors (272633).

68367631 is a wasteful number, since it uses less digits than its factorization.

68367631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272632.

The product of its digits is 108864, while the sum is 40.

The square root of 68367631 is about 8268.4721079532. The cubic root of 68367631 is about 408.8997488643.

The spelling of 68367631 in words is "sixty-eight million, three hundred sixty-seven thousand, six hundred thirty-one".