1906739 has 2 divisors, whose sum is σ = 1906740. Its totient is φ = 1906738.

The previous prime is 1906733. The next prime is 1906747. The reversal of 1906739 is 9376091.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1906739 - 2¹² = 1902643 is a prime.

It is a super-2 number, since 2×1906739² = 7271307228242, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1906699 and 1906708.

It is not a weakly prime, because it can be changed into another prime (1906733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 953369 + 953370.

It is an arithmetic number, because the mean of its divisors is an integer number (953370).

2^1906739 is an apocalyptic number.

1906739 is a deficient number, since it is larger than the sum of its proper divisors (1).

1906739 is an equidigital number, since it uses as much as digits as its factorization.

1906739 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10206, while the sum is 35.

The square root of 1906739 is about 1380.8472037123. The cubic root of 1906739 is about 124.0024930127.

The spelling of 1906739 in words is "one million, nine hundred six thousand, seven hundred thirty-nine".