1955640007 has 2 divisors, whose sum is σ = 1955640008. Its totient is φ = 1955640006.

The previous prime is 1955639993. The next prime is 1955640083. The reversal of 1955640007 is 7000465591.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1955640007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1955640707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 977820003 + 977820004.

It is an arithmetic number, because the mean of its divisors is an integer number (977820004).

Almost surely, 2^1955640007 is an apocalyptic number.

1955640007 is a deficient number, since it is larger than the sum of its proper divisors (1).

1955640007 is an equidigital number, since it uses as much as digits as its factorization.

1955640007 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37800, while the sum is 37.

The square root of 1955640007 is about 44222.6187261677. The cubic root of 1955640007 is about 1250.5363046956.

The spelling of 1955640007 in words is "one billion, nine hundred fifty-five million, six hundred forty thousand, seven".