1641028723 has 2 divisors, whose sum is σ = 1641028724. Its totient is φ = 1641028722.

The previous prime is 1641028703. The next prime is 1641028729. The reversal of 1641028723 is 3278201461.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1641028723 - 2¹⁷ = 1640897651 is a prime.

It is a super-2 number, since 2×1641028723² = 5385950539422021458, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1641028729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 820514361 + 820514362.

It is an arithmetic number, because the mean of its divisors is an integer number (820514362).

Almost surely, 2^1641028723 is an apocalyptic number.

1641028723 is a deficient number, since it is larger than the sum of its proper divisors (1).

1641028723 is an equidigital number, since it uses as much as digits as its factorization.

1641028723 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 1641028723 is about 40509.6127234018. The cubic root of 1641028723 is about 1179.5202308433.

The spelling of 1641028723 in words is "one billion, six hundred forty-one million, twenty-eight thousand, seven hundred twenty-three".