1399957067 has 2 divisors, whose sum is σ = 1399957068. Its totient is φ = 1399957066.

The previous prime is 1399957051. The next prime is 1399957073. The reversal of 1399957067 is 7607599931.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1399957067 - 2⁴ = 1399957051 is a prime.

It is not a weakly prime, because it can be changed into another prime (1399957037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 699978533 + 699978534.

It is an arithmetic number, because the mean of its divisors is an integer number (699978534).

Almost surely, 2^1399957067 is an apocalyptic number.

1399957067 is a deficient number, since it is larger than the sum of its proper divisors (1).

1399957067 is an equidigital number, since it uses as much as digits as its factorization.

1399957067 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3214890, while the sum is 56.

The square root of 1399957067 is about 37416.0001469959. Note that the first 3 decimals coincide. The cubic root of 1399957067 is about 1118.6775065663.

The spelling of 1399957067 in words is "one billion, three hundred ninety-nine million, nine hundred fifty-seven thousand, sixty-seven".