397786007 has 2 divisors, whose sum is σ = 397786008. Its totient is φ = 397786006.

The previous prime is 397786003. The next prime is 397786021. The reversal of 397786007 is 700687793.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 397786007 - 2² = 397786003 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (397786003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198893003 + 198893004.

It is an arithmetic number, because the mean of its divisors is an integer number (198893004).

Almost surely, 2^397786007 is an apocalyptic number.

397786007 is a deficient number, since it is larger than the sum of its proper divisors (1).

397786007 is an equidigital number, since it uses as much as digits as its factorization.

397786007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 444528, while the sum is 47.

The square root of 397786007 is about 19944.5733722233. The cubic root of 397786007 is about 735.4443805710. Note that the first 3 decimals are identical.

The spelling of 397786007 in words is "three hundred ninety-seven million, seven hundred eighty-six thousand, seven".