1354623691 has 2 divisors, whose sum is σ = 1354623692. Its totient is φ = 1354623690.

The previous prime is 1354623689. The next prime is 1354623713. The reversal of 1354623691 is 1963264531.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1354623691 - 2¹ = 1354623689 is a prime.

Together with 1354623689, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1354623671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 677311845 + 677311846.

It is an arithmetic number, because the mean of its divisors is an integer number (677311846).

Almost surely, 2^1354623691 is an apocalyptic number.

1354623691 is a deficient number, since it is larger than the sum of its proper divisors (1).

1354623691 is an equidigital number, since it uses as much as digits as its factorization.

1354623691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 116640, while the sum is 40.

The square root of 1354623691 is about 36805.2128237292. The cubic root of 1354623691 is about 1106.4697765182.

The spelling of 1354623691 in words is "one billion, three hundred fifty-four million, six hundred twenty-three thousand, six hundred ninety-one".