1906742731 has 2 divisors, whose sum is σ = 1906742732. Its totient is φ = 1906742730.

The previous prime is 1906742713. The next prime is 1906742737. The reversal of 1906742731 is 1372476091.

Together with previous prime (1906742713) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1906742731 - 2⁷ = 1906742603 is a prime.

It is a super-2 number, since 2×1906742731² = 7271335684442676722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1906742737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 953371365 + 953371366.

It is an arithmetic number, because the mean of its divisors is an integer number (953371366).

Almost surely, 2^1906742731 is an apocalyptic number.

1906742731 is a deficient number, since it is larger than the sum of its proper divisors (1).

1906742731 is an equidigital number, since it uses as much as digits as its factorization.

1906742731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 63504, while the sum is 40.

The square root of 1906742731 is about 43666.2653658405. The cubic root of 1906742731 is about 1240.0257389298.

The spelling of 1906742731 in words is "one billion, nine hundred six million, seven hundred forty-two thousand, seven hundred thirty-one".