107970721 has 4 divisors (see below), whose sum is σ = 110481712. Its totient is φ = 105459732.

The previous prime is 107970697. The next prime is 107970727. The reversal of 107970721 is 127079701.

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, and also an emirpimes, since its reverse is a distinct semiprime: 127079701 = 7 ⋅18154243.

It is a cyclic number.

It is not a de Polignac number, because 107970721 - 2⁹ = 107970209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (107970727) 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, 1255431 + ... + 1255516.

It is an arithmetic number, because the mean of its divisors is an integer number (27620428).

Almost surely, 2^107970721 is an apocalyptic number.

It is an amenable number.

107970721 is a deficient number, since it is larger than the sum of its proper divisors (2510991).

107970721 is an equidigital number, since it uses as much as digits as its factorization.

107970721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2510990.

The product of its (nonzero) digits is 6174, while the sum is 34.

The square root of 107970721 is about 10390.8960633816. The cubic root of 107970721 is about 476.1772769645.

The spelling of 107970721 in words is "one hundred seven million, nine hundred seventy thousand, seven hundred twenty-one".