3971402487 has 48 divisors (see below), whose sum is σ = 6745848480. Its totient is φ = 2300133888.

The previous prime is 3971402483. The next prime is 3971402489. The reversal of 3971402487 is 7842041793.

3971402487 is a `hidden beast` number, since 397 + 14 + 0 + 248 + 7 = 666.

It is not a de Polignac number, because 3971402487 - 2² = 3971402483 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3971402483) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 51973 + ... + 103169.

It is an arithmetic number, because the mean of its divisors is an integer number (140538510).

Almost surely, 2^3971402487 is an apocalyptic number.

3971402487 is a deficient number, since it is larger than the sum of its proper divisors (2774445993).

3971402487 is a wasteful number, since it uses less digits than its factorization.

3971402487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51249 (or 51230 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The square root of 3971402487 is about 63019.0644725864. The cubic root of 3971402487 is about 1583.6090238265.

The spelling of 3971402487 in words is "three billion, nine hundred seventy-one million, four hundred two thousand, four hundred eighty-seven".