6129990787 has 4 divisors (see below), whose sum is σ = 6131847736. Its totient is φ = 6128133840.

The previous prime is 6129990773. The next prime is 6129990847. The reversal of 6129990787 is 7870999216.

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 6129990787 - 2²⁷ = 5995773059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6129990487) 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, 923514 + ... + 930127.

It is an arithmetic number, because the mean of its divisors is an integer number (1532961934).

Almost surely, 2^6129990787 is an apocalyptic number.

6129990787 is a deficient number, since it is larger than the sum of its proper divisors (1856949).

6129990787 is a wasteful number, since it uses less digits than its factorization.

6129990787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1856948.

The product of its (nonzero) digits is 3429216, while the sum is 58.

The square root of 6129990787 is about 78294.2576885432. The cubic root of 6129990787 is about 1830.1496674549.

The spelling of 6129990787 in words is "six billion, one hundred twenty-nine million, nine hundred ninety thousand, seven hundred eighty-seven".