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690630291 = 32135902823
BaseRepresentation
bin101001001010100…
…010111010010011
31210010112122122200
4221022202322103
52403300132131
6152310334243
723054155251
oct5112427223
91703478580
10690630291
1132492a83a
1217335a383
13b010b6a0
1467a195d1
15409712e6
hex292a2e93

690630291 has 12 divisors (see below), whose sum is σ = 1074313968. Its totient is φ = 425003184.

The previous prime is 690630251. The next prime is 690630313. The reversal of 690630291 is 192036096.

It is not a de Polignac number, because 690630291 - 27 = 690630163 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (690630251) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2951295 + ... + 2951528.

It is an arithmetic number, because the mean of its divisors is an integer number (89526164).

Almost surely, 2690630291 is an apocalyptic number.

690630291 is a deficient number, since it is larger than the sum of its proper divisors (383683677).

690630291 is a wasteful number, since it uses less digits than its factorization.

690630291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5902842 (or 5902839 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 36.

The square root of 690630291 is about 26279.8457187252. The cubic root of 690630291 is about 883.9245732379.

The spelling of 690630291 in words is "six hundred ninety million, six hundred thirty thousand, two hundred ninety-one".

Divisors: 1 3 9 13 39 117 5902823 17708469 53125407 76736699 230210097 690630291