26430431 has 2 divisors, whose sum is σ = 26430432. Its totient is φ = 26430430.

The previous prime is 26430409. The next prime is 26430457. The reversal of 26430431 is 13403462.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26430431 is a prime.

It is a super-2 number, since 2×26430431² = 1397135365691522, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 26430397 and 26430406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26430031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13215215 + 13215216.

It is an arithmetic number, because the mean of its divisors is an integer number (13215216).

Almost surely, 2^26430431 is an apocalyptic number.

26430431 is a deficient number, since it is larger than the sum of its proper divisors (1).

26430431 is an equidigital number, since it uses as much as digits as its factorization.

26430431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 26430431 is about 5141.0534912603. The cubic root of 26430431 is about 297.8754753510.

Adding to 26430431 its reverse (13403462), we get a palindrome (39833893).

The spelling of 26430431 in words is "twenty-six million, four hundred thirty thousand, four hundred thirty-one".