1906698049 has 2 divisors, whose sum is σ = 1906698050. Its totient is φ = 1906698048.

The previous prime is 1906698037. The next prime is 1906698107. The reversal of 1906698049 is 9408966091.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1232361025 + 674337024 = 35105^2 + 25968^2 .

It is a cyclic number.

It is not a de Polignac number, because 1906698049 - 2⁹ = 1906697537 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1906697987 and 1906698005.

It is not a weakly prime, because it can be changed into another prime (1906698349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 953349024 + 953349025.

It is an arithmetic number, because the mean of its divisors is an integer number (953349025).

Almost surely, 2^1906698049 is an apocalyptic number.

It is an amenable number.

1906698049 is a deficient number, since it is larger than the sum of its proper divisors (1).

1906698049 is an equidigital number, since it uses as much as digits as its factorization.

1906698049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 839808, while the sum is 52.

The square root of 1906698049 is about 43665.7537321870. The cubic root of 1906698049 is about 1240.0160527318.

The spelling of 1906698049 in words is "one billion, nine hundred six million, six hundred ninety-eight thousand, forty-nine".