73397881 has 2 divisors, whose sum is σ = 73397882. Its totient is φ = 73397880.

The previous prime is 73397843. The next prime is 73397917. The reversal of 73397881 is 18879337.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56250000 + 17147881 = 7500^2 + 4141^2 .

It is a cyclic number.

It is not a de Polignac number, because 73397881 - 2¹³ = 73389689 is a prime.

It is a super-2 number, since 2×73397881² = 10774497870580322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (73397081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36698940 + 36698941.

It is an arithmetic number, because the mean of its divisors is an integer number (36698941).

Almost surely, 2^73397881 is an apocalyptic number.

It is an amenable number.

73397881 is a deficient number, since it is larger than the sum of its proper divisors (1).

73397881 is an equidigital number, since it uses as much as digits as its factorization.

73397881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 254016, while the sum is 46.

The square root of 73397881 is about 8567.2563286037. The cubic root of 73397881 is about 418.6918500675.

The spelling of 73397881 in words is "seventy-three million, three hundred ninety-seven thousand, eight hundred eighty-one".