746537721 has 8 divisors (see below), whose sum is σ = 1047772320. Its totient is φ = 471497472.

The previous prime is 746537719. The next prime is 746537741. The reversal of 746537721 is 127735647.

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

It is not a de Polignac number, because 746537721 - 2¹ = 746537719 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (746537741) 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, 6548520 + ... + 6548633.

It is an arithmetic number, because the mean of its divisors is an integer number (130971540).

Almost surely, 2^746537721 is an apocalyptic number.

It is an amenable number.

746537721 is a deficient number, since it is larger than the sum of its proper divisors (301234599).

746537721 is a wasteful number, since it uses less digits than its factorization.

746537721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13097175.

The product of its digits is 246960, while the sum is 42.

The square root of 746537721 is about 27322.8424765799. The cubic root of 746537721 is about 907.1600554185.

The spelling of 746537721 in words is "seven hundred forty-six million, five hundred thirty-seven thousand, seven hundred twenty-one".