1990656007 has 2 divisors, whose sum is σ = 1990656008. Its totient is φ = 1990656006.

The previous prime is 1990655993. The next prime is 1990656013. The reversal of 1990656007 is 7006560991.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1990656007 - 2⁷ = 1990655879 is a prime.

It is a super-2 number, since 2×1990656007² = 7925422676410368098, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1990656307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 995328003 + 995328004.

It is an arithmetic number, because the mean of its divisors is an integer number (995328004).

Almost surely, 2^1990656007 is an apocalyptic number.

1990656007 is a deficient number, since it is larger than the sum of its proper divisors (1).

1990656007 is an equidigital number, since it uses as much as digits as its factorization.

1990656007 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 102060, while the sum is 43.

The square root of 1990656007 is about 44616.7682267553. The cubic root of 1990656007 is about 1257.9558706948.

The spelling of 1990656007 in words is "one billion, nine hundred ninety million, six hundred fifty-six thousand, seven".