97072643 has 2 divisors, whose sum is σ = 97072644. Its totient is φ = 97072642.

The previous prime is 97072621. The next prime is 97072681. The reversal of 97072643 is 34627079.

It is an a-pointer prime, because the next prime (97072681) can be obtained adding 97072643 to its sum of digits (38).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 97072643 - 2¹⁰ = 97071619 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 97072597 and 97072606.

It is not a weakly prime, because it can be changed into another prime (97072603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48536321 + 48536322.

It is an arithmetic number, because the mean of its divisors is an integer number (48536322).

Almost surely, 2^97072643 is an apocalyptic number.

97072643 is a deficient number, since it is larger than the sum of its proper divisors (1).

97072643 is an equidigital number, since it uses as much as digits as its factorization.

97072643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 63504, while the sum is 38.

The square root of 97072643 is about 9852.5450011659. The cubic root of 97072643 is about 459.5847591764.

The spelling of 97072643 in words is "ninety-seven million, seventy-two thousand, six hundred forty-three".