74640073 has 2 divisors, whose sum is σ = 74640074. Its totient is φ = 74640072.

The previous prime is 74640067. The next prime is 74640101. The reversal of 74640073 is 37004647.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70090384 + 4549689 = 8372^2 + 2133^2 .

It is a cyclic number.

It is not a de Polignac number, because 74640073 - 2⁹ = 74639561 is a prime.

It is a super-2 number, since 2×74640073² = 11142280994890658, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (74640043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37320036 + 37320037.

It is an arithmetic number, because the mean of its divisors is an integer number (37320037).

Almost surely, 2^74640073 is an apocalyptic number.

It is an amenable number.

74640073 is a deficient number, since it is larger than the sum of its proper divisors (1).

74640073 is an equidigital number, since it uses as much as digits as its factorization.

74640073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14112, while the sum is 31.

The square root of 74640073 is about 8639.4486513897. The cubic root of 74640073 is about 421.0406412997.

The spelling of 74640073 in words is "seventy-four million, six hundred forty thousand, seventy-three".