5436994391 has 2 divisors, whose sum is σ = 5436994392. Its totient is φ = 5436994390.

The previous prime is 5436994369. The next prime is 5436994411. The reversal of 5436994391 is 1934996345.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 5436994391 - 2¹⁸ = 5436732247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5436994301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2718497195 + 2718497196.

It is an arithmetic number, because the mean of its divisors is an integer number (2718497196).

Almost surely, 2^5436994391 is an apocalyptic number.

5436994391 is a deficient number, since it is larger than the sum of its proper divisors (1).

5436994391 is an equidigital number, since it uses as much as digits as its factorization.

5436994391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3149280, while the sum is 53.

The square root of 5436994391 is about 73735.9775889626. The cubic root of 5436994391 is about 1758.4079084373.

The spelling of 5436994391 in words is "five billion, four hundred thirty-six million, nine hundred ninety-four thousand, three hundred ninety-one".