70972961 has 18 divisors (see below), whose sum is σ = 77392530. Its totient is φ = 65067552.

The previous prime is 70972939. The next prime is 70972991. The reversal of 70972961 is 16927907.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 51036736 + 19936225 = 7144^2 + 4465^2 .

It is not a de Polignac number, because 70972961 - 2⁶ = 70972897 is a prime.

It is a super-2 number, since 2×70972961² = 10074322386215042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70972901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 797405 + ... + 797493.

It is an arithmetic number, because the mean of its divisors is an integer number (4299585).

Almost surely, 2^70972961 is an apocalyptic number.

It is an amenable number.

70972961 is a deficient number, since it is larger than the sum of its proper divisors (6419569).

70972961 is an equidigital number, since it uses as much as digits as its factorization.

70972961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221 (or 155 counting only the distinct ones).

The product of its (nonzero) digits is 47628, while the sum is 41.

The square root of 70972961 is about 8424.5451509265. The cubic root of 70972961 is about 414.0292032112.

The spelling of 70972961 in words is "seventy million, nine hundred seventy-two thousand, nine hundred sixty-one".