68440461 has 4 divisors (see below), whose sum is σ = 91253952. Its totient is φ = 45626972.

The previous prime is 68440459. The next prime is 68440469. The reversal of 68440461 is 16404486.

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.

It is a cyclic number.

It is not a de Polignac number, because 68440461 - 2¹ = 68440459 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68440469) 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, 11406741 + ... + 11406746.

It is an arithmetic number, because the mean of its divisors is an integer number (22813488).

Almost surely, 2^68440461 is an apocalyptic number.

It is an amenable number.

68440461 is a deficient number, since it is larger than the sum of its proper divisors (22813491).

68440461 is a wasteful number, since it uses less digits than its factorization.

68440461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22813490.

The product of its (nonzero) digits is 18432, while the sum is 33.

The square root of 68440461 is about 8272.8750141653. The cubic root of 68440461 is about 409.0448935762.

The spelling of 68440461 in words is "sixty-eight million, four hundred forty thousand, four hundred sixty-one".