1950643 has 2 divisors, whose sum is σ = 1950644. Its totient is φ = 1950642.

The previous prime is 1950629. The next prime is 1950649. The reversal of 1950643 is 3460591.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1950643 is a prime.

It is a super-2 number, since 2×1950643² = 7610016226898, which contains 22 as substring.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (1950649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 975321 + 975322.

It is an arithmetic number, because the mean of its divisors is an integer number (975322).

2^1950643 is an apocalyptic number.

1950643 is a deficient number, since it is larger than the sum of its proper divisors (1).

1950643 is an equidigital number, since it uses as much as digits as its factorization.

1950643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 1950643 is about 1396.6542163327. The cubic root of 1950643 is about 124.9470282218.

The spelling of 1950643 in words is "one million, nine hundred fifty thousand, six hundred forty-three".