70020691 has 8 divisors (see below), whose sum is σ = 75587904. Its totient is φ = 64479360.

The previous prime is 70020689. The next prime is 70020701. The reversal of 70020691 is 19602007.

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 70020691 - 2¹ = 70020689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70020611) 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 7 ways as a sum of consecutive naturals, for example, 646 + ... + 11851.

It is an arithmetic number, because the mean of its divisors is an integer number (9448488).

Almost surely, 2^70020691 is an apocalyptic number.

70020691 is a deficient number, since it is larger than the sum of its proper divisors (5567213).

70020691 is a wasteful number, since it uses less digits than its factorization.

70020691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12941.

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 70020691 is about 8367.8366977374. The cubic root of 70020691 is about 412.1691324159.

Adding to 70020691 its reverse (19602007), we get a palindrome (89622698).

The spelling of 70020691 in words is "seventy million, twenty thousand, six hundred ninety-one".