70945917 has 8 divisors (see below), whose sum is σ = 108108096. Its totient is φ = 40540512.

The previous prime is 70945891. The next prime is 70945951. The reversal of 70945917 is 71954907.

It is a happy number.

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

It is not a de Polignac number, because 70945917 - 2¹⁹ = 70421629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70945957) 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, 1689168 + ... + 1689209.

It is an arithmetic number, because the mean of its divisors is an integer number (13513512).

Almost surely, 2^70945917 is an apocalyptic number.

It is an amenable number.

70945917 is a deficient number, since it is larger than the sum of its proper divisors (37162179).

70945917 is a wasteful number, since it uses less digits than its factorization.

70945917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3378387.

The product of its (nonzero) digits is 79380, while the sum is 42.

The square root of 70945917 is about 8422.9399261778. The cubic root of 70945917 is about 413.9766084009.

The spelling of 70945917 in words is "seventy million, nine hundred forty-five thousand, nine hundred seventeen".