28137451 has 2 divisors, whose sum is σ = 28137452. Its totient is φ = 28137450.

The previous prime is 28137449. The next prime is 28137479. The reversal of 28137451 is 15473182.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28137451 - 2¹ = 28137449 is a prime.

It is a super-2 number, since 2×28137451² = 1583432297554802, which contains 22 as substring.

Together with 28137449, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (28137401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14068725 + 14068726.

It is an arithmetic number, because the mean of its divisors is an integer number (14068726).

Almost surely, 2^28137451 is an apocalyptic number.

28137451 is a deficient number, since it is larger than the sum of its proper divisors (1).

28137451 is an equidigital number, since it uses as much as digits as its factorization.

28137451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6720, while the sum is 31.

The square root of 28137451 is about 5304.4746205444. The cubic root of 28137451 is about 304.1549698969.

The spelling of 28137451 in words is "twenty-eight million, one hundred thirty-seven thousand, four hundred fifty-one".