967245721 has 8 divisors (see below), whose sum is σ = 1045525320. Its totient is φ = 889519872.

The previous prime is 967245689. The next prime is 967245731. The reversal of 967245721 is 127542769.

It can be written as a sum of positive squares in 4 ways, for example, as 35721 + 967210000 = 189^2 + 31100^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 967245721 - 2⁵ = 967245689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (967245731) 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, 134800 + ... + 141793.

It is an arithmetic number, because the mean of its divisors is an integer number (130690665).

Almost surely, 2^967245721 is an apocalyptic number.

It is an amenable number.

967245721 is a deficient number, since it is larger than the sum of its proper divisors (78279599).

967245721 is a wasteful number, since it uses less digits than its factorization.

967245721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276875.

The product of its digits is 211680, while the sum is 43.

The square root of 967245721 is about 31100.5742873022. The cubic root of 967245721 is about 988.9604845642.

The spelling of 967245721 in words is "nine hundred sixty-seven million, two hundred forty-five thousand, seven hundred twenty-one".