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130913279 = 7293171293
BaseRepresentation
bin1111100110110…
…01001111111111
3100010100002020222
413303121033333
5232003211104
620553531555
73146513240
oct763311777
9303302228
10130913279
11679960a2
1237a13bbb
13211783a3
141355acc7
15b75e1be
hex7cd93ff

130913279 has 32 divisors (see below), whose sum is σ = 162570240. Its totient is φ = 103017600.

The previous prime is 130913269. The next prime is 130913297. The reversal of 130913279 is 972319031.

It is a de Polignac number, because none of the positive numbers 2k-130913279 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130913219) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 446657 + ... + 446949.

It is an arithmetic number, because the mean of its divisors is an integer number (5080320).

Almost surely, 2130913279 is an apocalyptic number.

130913279 is a deficient number, since it is larger than the sum of its proper divisors (31656961).

130913279 is a wasteful number, since it uses less digits than its factorization.

130913279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431.

The product of its (nonzero) digits is 10206, while the sum is 35.

The square root of 130913279 is about 11441.7340906001. The cubic root of 130913279 is about 507.7632132154.

The spelling of 130913279 in words is "one hundred thirty million, nine hundred thirteen thousand, two hundred seventy-nine".

Divisors: 1 7 29 31 71 203 217 293 497 899 2051 2059 2201 6293 8497 9083 14413 15407 20803 59479 63581 63829 145621 263407 446803 603287 644893 1843849 4223009 4514251 18701897 130913279