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70008161 = 5910511129
BaseRepresentation
bin1000010110000…
…11110101100001
311212201210010212
410023003311201
5120410230121
610540303505
71510026266
oct413036541
9155653125
1070008161
1136577193
121b541b95
1311672462
14942526d
15622d25b
hex42c3d61

70008161 has 8 divisors (see below), whose sum is σ = 71325600. Its totient is φ = 68695200.

The previous prime is 70008143. The next prime is 70008209. The reversal of 70008161 is 16180007.

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 70008161 - 214 = 69991777 is a prime.

It is a super-2 number, since 2×700081612 = 9802285213203842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70008461) 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, 61445 + ... + 62573.

It is an arithmetic number, because the mean of its divisors is an integer number (8915700).

Almost surely, 270008161 is an apocalyptic number.

It is an amenable number.

70008161 is a deficient number, since it is larger than the sum of its proper divisors (1317439).

70008161 is a wasteful number, since it uses less digits than its factorization.

70008161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2239.

The product of its (nonzero) digits is 336, while the sum is 23.

The square root of 70008161 is about 8367.0879641605. The cubic root of 70008161 is about 412.1445454582.

Adding to 70008161 its reverse (16180007), we get a palindrome (86188168).

The spelling of 70008161 in words is "seventy million, eight thousand, one hundred sixty-one".

Divisors: 1 59 1051 1129 62009 66611 1186579 70008161