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83712925 = 5216720051
BaseRepresentation
bin1001111110101…
…01101110011101
312211112001112201
410333111232131
5132412303200
612150131501
72034356002
oct477255635
9184461481
1083712925
114328783a
1224050b91
131446039a
14b1918a9
157538c6a
hex4fd5b9d

83712925 has 12 divisors (see below), whose sum is σ = 104430816. Its totient is φ = 66566000.

The previous prime is 83712911. The next prime is 83712931. The reversal of 83712925 is 52921738.

It is not a de Polignac number, because 83712925 - 223 = 75324317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5851 + ... + 14200.

It is an arithmetic number, because the mean of its divisors is an integer number (8702568).

Almost surely, 283712925 is an apocalyptic number.

It is an amenable number.

83712925 is a deficient number, since it is larger than the sum of its proper divisors (20717891).

83712925 is a wasteful number, since it uses less digits than its factorization.

83712925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20228 (or 20223 counting only the distinct ones).

The product of its digits is 30240, while the sum is 37.

The square root of 83712925 is about 9149.4767609957. The cubic root of 83712925 is about 437.4524356454.

The spelling of 83712925 in words is "eighty-three million, seven hundred twelve thousand, nine hundred twenty-five".

Divisors: 1 5 25 167 835 4175 20051 100255 501275 3348517 16742585 83712925