73997819 has 8 divisors (see below), whose sum is σ = 85955808. Its totient is φ = 62386560.

The previous prime is 73997801. The next prime is 73997849. The reversal of 73997819 is 91879937.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 73997819 - 2⁸ = 73997563 is a prime.

It is a super-2 number, since 2×73997819² = 10951354433513522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73997849) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86222 + ... + 87075.

It is an arithmetic number, because the mean of its divisors is an integer number (10744476).

Almost surely, 2^73997819 is an apocalyptic number.

73997819 is a deficient number, since it is larger than the sum of its proper divisors (11957989).

73997819 is a wasteful number, since it uses less digits than its factorization.

73997819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173365.

The product of its digits is 857304, while the sum is 53.

The square root of 73997819 is about 8602.1984980585. The cubic root of 73997819 is about 419.8295207584.

The spelling of 73997819 in words is "seventy-three million, nine hundred ninety-seven thousand, eight hundred nineteen".