1640276683 has 2 divisors, whose sum is σ = 1640276684. Its totient is φ = 1640276682.

The previous prime is 1640276657. The next prime is 1640276689. The reversal of 1640276683 is 3866720461.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1640276683 - 2¹³ = 1640268491 is a prime.

It is not a weakly prime, because it can be changed into another prime (1640276689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 820138341 + 820138342.

It is an arithmetic number, because the mean of its divisors is an integer number (820138342).

Almost surely, 2^1640276683 is an apocalyptic number.

1640276683 is a deficient number, since it is larger than the sum of its proper divisors (1).

1640276683 is an equidigital number, since it uses as much as digits as its factorization.

1640276683 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 290304, while the sum is 43.

The square root of 1640276683 is about 40500.3294184134. The cubic root of 1640276683 is about 1179.3400223518.

The spelling of 1640276683 in words is "one billion, six hundred forty million, two hundred seventy-six thousand, six hundred eighty-three".