26620457 has 2 divisors, whose sum is σ = 26620458. Its totient is φ = 26620456.

The previous prime is 26620441. The next prime is 26620481. The reversal of 26620457 is 75402662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24245776 + 2374681 = 4924^2 + 1541^2 .

It is a cyclic number.

It is not a de Polignac number, because 26620457 - 2⁴ = 26620441 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (26620417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13310228 + 13310229.

It is an arithmetic number, because the mean of its divisors is an integer number (13310229).

Almost surely, 2^26620457 is an apocalyptic number.

It is an amenable number.

26620457 is a deficient number, since it is larger than the sum of its proper divisors (1).

26620457 is an equidigital number, since it uses as much as digits as its factorization.

26620457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 26620457 is about 5159.5016232190. The cubic root of 26620457 is about 298.5876464780.

The spelling of 26620457 in words is "twenty-six million, six hundred twenty thousand, four hundred fifty-seven".