28972969 has 2 divisors, whose sum is σ = 28972970. Its totient is φ = 28972968.

The previous prime is 28972919. The next prime is 28972991. The reversal of 28972969 is 96927982.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27962944 + 1010025 = 5288^2 + 1005^2 .

It is a cyclic number.

It is not a de Polignac number, because 28972969 - 2¹⁵ = 28940201 is a prime.

It is a super-2 number, since 2×28972969² = 1678865865349922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28972919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14486484 + 14486485.

It is an arithmetic number, because the mean of its divisors is an integer number (14486485).

Almost surely, 2^28972969 is an apocalyptic number.

It is an amenable number.

28972969 is a deficient number, since it is larger than the sum of its proper divisors (1).

28972969 is an equidigital number, since it uses as much as digits as its factorization.

28972969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 979776, while the sum is 52.

The square root of 28972969 is about 5382.6544566784. The cubic root of 28972969 is about 307.1361956576.

The spelling of 28972969 in words is "twenty-eight million, nine hundred seventy-two thousand, nine hundred sixty-nine".