28154999 has 2 divisors, whose sum is σ = 28155000. Its totient is φ = 28154998.

The previous prime is 28154993. The next prime is 28155073. The reversal of 28154999 is 99945182.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28154999 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28154993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14077499 + 14077500.

It is an arithmetic number, because the mean of its divisors is an integer number (14077500).

Almost surely, 2^28154999 is an apocalyptic number.

28154999 is a deficient number, since it is larger than the sum of its proper divisors (1).

28154999 is an equidigital number, since it uses as much as digits as its factorization.

28154999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 233280, while the sum is 47.

The square root of 28154999 is about 5306.1284379480. The cubic root of 28154999 is about 304.2181857897.

The spelling of 28154999 in words is "twenty-eight million, one hundred fifty-four thousand, nine hundred ninety-nine".