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3974 = 21987
BaseRepresentation
bin111110000110
312110012
4332012
5111344
630222
714405
oct7606
95405
103974
112a93
122372
131a69
14163c
15129e
hexf86

3974 has 4 divisors (see below), whose sum is σ = 5964. Its totient is φ = 1986.

The previous prime is 3967. The next prime is 3989. The reversal of 3974 is 4793.

3974 = 302 + 312 + ... + 332.

It is a semiprime because it is the product of two primes.

It is a magnanimous number.

It is an Ulam number.

It is a Curzon number.

It is a plaindrome in base 5 and base 15.

It is a nialpdrome in base 16.

It is a congruent number.

It is an unprimeable number.

3974 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 992 + ... + 995.

It is an arithmetic number, because the mean of its divisors is an integer number (1491).

23974 is an apocalyptic number.

3974 is a deficient number, since it is larger than the sum of its proper divisors (1990).

3974 is a wasteful number, since it uses less digits than its factorization.

3974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1989.

The product of its digits is 756, while the sum is 23.

The square root of 3974 is about 63.0396700499. The cubic root of 3974 is about 15.8395420403.

The spelling of 3974 in words is "three thousand, nine hundred seventy-four".

Divisors: 1 2 1987 3974