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691053042 = 23115175507
BaseRepresentation
bin101001001100001…
…010000111110010
31210011100010120010
4221030022013302
52403402144132
6152323355350
723060565621
oct5114120762
91704303503
10691053042
11325099419
12173522b56
13b0228c34
1467ac96b8
1540a066cc
hex2930a1f2

691053042 has 8 divisors (see below), whose sum is σ = 1382106096. Its totient is φ = 230351012.

The previous prime is 691053037. The next prime is 691053067. The reversal of 691053042 is 240350196.

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

691053042 is an admirable number.

It is a super-4 number, since 4×6910530424 (a number of 36 digits) contains 4444 as substring.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 57587748 + ... + 57587759.

It is an arithmetic number, because the mean of its divisors is an integer number (172763262).

Almost surely, 2691053042 is an apocalyptic number.

691053042 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

691053042 is a wasteful number, since it uses less digits than its factorization.

691053042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115175512.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 691053042 is about 26287.8877432174. The cubic root of 691053042 is about 884.1048934382.

The spelling of 691053042 in words is "six hundred ninety-one million, fifty-three thousand, forty-two".

Divisors: 1 2 3 6 115175507 230351014 345526521 691053042