28947051001 has 4 divisors (see below), whose sum is σ = 31578601104. Its totient is φ = 26315500900.

The previous prime is 28947050999. The next prime is 28947051013. The reversal of 28947051001 is 10015074982.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28947051001 - 2¹ = 28947050999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28947051401) 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, 1315775035 + ... + 1315775056.

It is an arithmetic number, because the mean of its divisors is an integer number (7894650276).

Almost surely, 2^28947051001 is an apocalyptic number.

It is an amenable number.

28947051001 is a deficient number, since it is larger than the sum of its proper divisors (2631550103).

28947051001 is a wasteful number, since it uses less digits than its factorization.

28947051001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2631550102.

The product of its (nonzero) digits is 20160, while the sum is 37.

The spelling of 28947051001 in words is "twenty-eight billion, nine hundred forty-seven million, fifty-one thousand, one".