70163690 has 32 divisors (see below), whose sum is σ = 128784384. Its totient is φ = 27518400.

The previous prime is 70163683. The next prime is 70163699. The reversal of 70163690 is 9636107.

It is a super-2 number, since 2×70163690² = 9845886788832200, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (70163699) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127997 + ... + 128543.

It is an arithmetic number, because the mean of its divisors is an integer number (4024512).

Almost surely, 2^70163690 is an apocalyptic number.

70163690 is a deficient number, since it is larger than the sum of its proper divisors (58620694).

70163690 is a wasteful number, since it uses less digits than its factorization.

70163690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 782.

The product of its (nonzero) digits is 6804, while the sum is 32.

The square root of 70163690 is about 8376.3769017398. The cubic root of 70163690 is about 412.4495242798.

Adding to 70163690 its reverse (9636107), we get a palindrome (79799797).

The spelling of 70163690 in words is "seventy million, one hundred sixty-three thousand, six hundred ninety".