397835651 has 2 divisors, whose sum is σ = 397835652. Its totient is φ = 397835650.

The previous prime is 397835639. The next prime is 397835663. The reversal of 397835651 is 156538793.

It is a balanced prime because it is at equal distance from previous prime (397835639) and next prime (397835663).

It is an emirp because it is prime and its reverse (156538793) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 397835651 - 2¹⁰ = 397834627 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 397835596 and 397835605.

It is not a weakly prime, because it can be changed into another prime (397835621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198917825 + 198917826.

It is an arithmetic number, because the mean of its divisors is an integer number (198917826).

Almost surely, 2^397835651 is an apocalyptic number.

397835651 is a deficient number, since it is larger than the sum of its proper divisors (1).

397835651 is an equidigital number, since it uses as much as digits as its factorization.

397835651 is an evil number, because the sum of its binary digits is even.

The product of its digits is 680400, while the sum is 47.

The square root of 397835651 is about 19945.8178824535. The cubic root of 397835651 is about 735.4749739733.

The spelling of 397835651 in words is "three hundred ninety-seven million, eight hundred thirty-five thousand, six hundred fifty-one".