46688721 has 8 divisors (see below), whose sum is σ = 62612160. Its totient is φ = 30945552.

The previous prime is 46688717. The next prime is 46688731. The reversal of 46688721 is 12788664.

46688721 = 181² + 182² + ... + 526².

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 46688721 - 2² = 46688717 is a prime.

It is not an unprimeable number, because it can be changed into a prime (46688731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44461 + ... + 45498.

It is an arithmetic number, because the mean of its divisors is an integer number (7826520).

Almost surely, 2^46688721 is an apocalyptic number.

It is an amenable number.

46688721 is a deficient number, since it is larger than the sum of its proper divisors (15923439).

46688721 is a wasteful number, since it uses less digits than its factorization.

46688721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90135.

The product of its digits is 129024, while the sum is 42.

The square root of 46688721 is about 6832.9145318817. The cubic root of 46688721 is about 360.0841392840.

The spelling of 46688721 in words is "forty-six million, six hundred eighty-eight thousand, seven hundred twenty-one".