3942520787 has 4 divisors (see below), whose sum is σ = 4026404256. Its totient is φ = 3858637320.

The previous prime is 3942520783. The next prime is 3942520789. The reversal of 3942520787 is 7870252493.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 3942520787 - 2² = 3942520783 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47), and also a Moran number because the ratio is a prime number: 83883421 = 3942520787 / (3 + 9 + 4 + 2 + 5 + 2 + 0 + 7 + 8 + 7).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3942520783) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41941664 + ... + 41941757.

It is an arithmetic number, because the mean of its divisors is an integer number (1006601064).

Almost surely, 2^3942520787 is an apocalyptic number.

3942520787 is a deficient number, since it is larger than the sum of its proper divisors (83883469).

3942520787 is an equidigital number, since it uses as much as digits as its factorization.

3942520787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83883468.

The product of its (nonzero) digits is 846720, while the sum is 47.

The square root of 3942520787 is about 62789.4958333000. The cubic root of 3942520787 is about 1579.7607909772.

The spelling of 3942520787 in words is "three billion, nine hundred forty-two million, five hundred twenty thousand, seven hundred eighty-seven".