26361989 has 2 divisors, whose sum is σ = 26361990. Its totient is φ = 26361988.

The previous prime is 26361983. The next prime is 26362003. The reversal of 26361989 is 98916362.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19731364 + 6630625 = 4442^2 + 2575^2 .

It is a cyclic number.

It is not a de Polignac number, because 26361989 - 2¹² = 26357893 is a prime.

It is a super-2 number, since 2×26361989² = 1389908928072242, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26361983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13180994 + 13180995.

It is an arithmetic number, because the mean of its divisors is an integer number (13180995).

Almost surely, 2^26361989 is an apocalyptic number.

It is an amenable number.

26361989 is a deficient number, since it is larger than the sum of its proper divisors (1).

26361989 is an equidigital number, since it uses as much as digits as its factorization.

26361989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 139968, while the sum is 44.

The square root of 26361989 is about 5134.3927586424. The cubic root of 26361989 is about 297.6181354147.

The spelling of 26361989 in words is "twenty-six million, three hundred sixty-one thousand, nine hundred eighty-nine".