1640914267 has 2 divisors, whose sum is σ = 1640914268. Its totient is φ = 1640914266.

The previous prime is 1640914217. The next prime is 1640914333. The reversal of 1640914267 is 7624190461.

It is a weak prime.

It is an emirp because it is prime and its reverse (7624190461) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1640914267 is a prime.

It is not a weakly prime, because it can be changed into another prime (1640914207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 820457133 + 820457134.

It is an arithmetic number, because the mean of its divisors is an integer number (820457134).

Almost surely, 2^1640914267 is an apocalyptic number.

1640914267 is a deficient number, since it is larger than the sum of its proper divisors (1).

1640914267 is an equidigital number, since it uses as much as digits as its factorization.

1640914267 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 1640914267 is about 40508.1999970376. The cubic root of 1640914267 is about 1179.4928077389.

The spelling of 1640914267 in words is "one billion, six hundred forty million, nine hundred fourteen thousand, two hundred sixty-seven".