1997470507 has 2 divisors, whose sum is σ = 1997470508. Its totient is φ = 1997470506.

The previous prime is 1997470483. The next prime is 1997470561. The reversal of 1997470507 is 7050747991.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1997470507 is a prime.

It is not a weakly prime, because it can be changed into another prime (1997470597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 998735253 + 998735254.

It is an arithmetic number, because the mean of its divisors is an integer number (998735254).

Almost surely, 2^1997470507 is an apocalyptic number.

1997470507 is a deficient number, since it is larger than the sum of its proper divisors (1).

1997470507 is an equidigital number, since it uses as much as digits as its factorization.

1997470507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 555660, while the sum is 49.

The square root of 1997470507 is about 44693.0700109089. The cubic root of 1997470507 is about 1259.3896655637.

The spelling of 1997470507 in words is "one billion, nine hundred ninety-seven million, four hundred seventy thousand, five hundred seven".