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64087069 = 499128431
BaseRepresentation
bin1111010001111…
…0010000011101
311110120221221011
43310132100131
5112401241234
610205335221
71405505524
oct364362035
9143527834
1064087069
11331a2622
1219567511
131037b357
1487234bb
15595db64
hex3d1e41d

64087069 has 4 divisors (see below), whose sum is σ = 64216000. Its totient is φ = 63958140.

The previous prime is 64087043. The next prime is 64087073. The reversal of 64087069 is 96078046.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 64087069 - 27 = 64086941 is a prime.

It is a super-2 number, since 2×640870692 = 8214304826021522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64087099) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63717 + ... + 64714.

It is an arithmetic number, because the mean of its divisors is an integer number (16054000).

Almost surely, 264087069 is an apocalyptic number.

It is an amenable number.

64087069 is a deficient number, since it is larger than the sum of its proper divisors (128931).

64087069 is a wasteful number, since it uses less digits than its factorization.

64087069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128930.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 64087069 is about 8005.4399629252. The cubic root of 64087069 is about 400.1813115529.

The spelling of 64087069 in words is "sixty-four million, eighty-seven thousand, sixty-nine".

Divisors: 1 499 128431 64087069