70725009 has 4 divisors (see below), whose sum is σ = 94300016. Its totient is φ = 47150004.

The previous prime is 70724963. The next prime is 70725029. The reversal of 70725009 is 90052707.

It is a happy number.

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.

It is not a de Polignac number, because 70725009 - 2⁹ = 70724497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70725029) 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 3 ways as a sum of consecutive naturals, for example, 11787499 + ... + 11787504.

It is an arithmetic number, because the mean of its divisors is an integer number (23575004).

Almost surely, 2^70725009 is an apocalyptic number.

It is an amenable number.

70725009 is a deficient number, since it is larger than the sum of its proper divisors (23575007).

70725009 is a wasteful number, since it uses less digits than its factorization.

70725009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23575006.

The product of its (nonzero) digits is 4410, while the sum is 30.

The square root of 70725009 is about 8409.8162286699. The cubic root of 70725009 is about 413.5464881472.

The spelling of 70725009 in words is "seventy million, seven hundred twenty-five thousand, nine".