73570643 has 2 divisors, whose sum is σ = 73570644. Its totient is φ = 73570642.

The previous prime is 73570633. The next prime is 73570649. The reversal of 73570643 is 34607537.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (34607537) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 73570643 - 2²⁰ = 72522067 is a prime.

It is a super-2 number, since 2×73570643² = 10825279022866898, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (73570649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36785321 + 36785322.

It is an arithmetic number, because the mean of its divisors is an integer number (36785322).

Almost surely, 2^73570643 is an apocalyptic number.

73570643 is a deficient number, since it is larger than the sum of its proper divisors (1).

73570643 is an equidigital number, since it uses as much as digits as its factorization.

73570643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52920, while the sum is 35.

The square root of 73570643 is about 8577.3330936836. Note that the first 3 decimals coincide. The cubic root of 73570643 is about 419.0200946156.

The spelling of 73570643 in words is "seventy-three million, five hundred seventy thousand, six hundred forty-three".