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74721023 = 1329474217
BaseRepresentation
bin1000111010000…
…10011011111111
312012121012222022
410131002123333
5123112033043
611225310355
71565055356
oct435023377
9165535868
1074721023
11391a6013
12210353bb
1312632630
149cd099d
15685e868
hex47426ff

74721023 has 16 divisors (see below), whose sum is σ = 85034880. Its totient is φ = 65162496.

The previous prime is 74721007. The next prime is 74721047. The reversal of 74721023 is 32012747.

It is a cyclic number.

It is not a de Polignac number, because 74721023 - 24 = 74721007 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 74720983 and 74721001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74721083) 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, 15611 + ... + 19827.

It is an arithmetic number, because the mean of its divisors is an integer number (5314680).

Almost surely, 274721023 is an apocalyptic number.

74721023 is a deficient number, since it is larger than the sum of its proper divisors (10313857).

74721023 is a wasteful number, since it uses less digits than its factorization.

74721023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4306.

The product of its (nonzero) digits is 2352, while the sum is 26.

The square root of 74721023 is about 8644.1322872802. The cubic root of 74721023 is about 421.1927978399.

The spelling of 74721023 in words is "seventy-four million, seven hundred twenty-one thousand, twenty-three".