1236491423 has 2 divisors, whose sum is σ = 1236491424. Its totient is φ = 1236491422.

The previous prime is 1236491401. The next prime is 1236491437. The reversal of 1236491423 is 3241946321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1236491423 - 2¹⁶ = 1236425887 is a prime.

It is a super-2 number, since 2×1236491423² = 3057822078305129858, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1236494423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 618245711 + 618245712.

It is an arithmetic number, because the mean of its divisors is an integer number (618245712).

Almost surely, 2^1236491423 is an apocalyptic number.

1236491423 is a deficient number, since it is larger than the sum of its proper divisors (1).

1236491423 is an equidigital number, since it uses as much as digits as its factorization.

1236491423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 35.

The square root of 1236491423 is about 35163.7799873677. The cubic root of 1236491423 is about 1073.3228357469.

The spelling of 1236491423 in words is "one billion, two hundred thirty-six million, four hundred ninety-one thousand, four hundred twenty-three".