1067639 has 2 divisors, whose sum is σ = 1067640. Its totient is φ = 1067638.

The previous prime is 1067621. The next prime is 1067653. The reversal of 1067639 is 9367601.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1067639 - 2⁸ = 1067383 is a prime.

It is a super-2 number, since 2×1067639² = 2279706068642, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1067669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 533819 + 533820.

It is an arithmetic number, because the mean of its divisors is an integer number (533820).

2^1067639 is an apocalyptic number.

1067639 is a deficient number, since it is larger than the sum of its proper divisors (1).

1067639 is an equidigital number, since it uses as much as digits as its factorization.

1067639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6804, while the sum is 32.

The square root of 1067639 is about 1033.2661806137. The cubic root of 1067639 is about 102.2056277323.

The spelling of 1067639 in words is "one million, sixty-seven thousand, six hundred thirty-nine".