73399961 has 4 divisors (see below), whose sum is σ = 73508112. Its totient is φ = 73291812.

The previous prime is 73399919. The next prime is 73399973. The reversal of 73399961 is 16999337.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16999337 = 17 ⋅999961.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73399961 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (73399901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53051 + ... + 54416.

It is an arithmetic number, because the mean of its divisors is an integer number (18377028).

Almost surely, 2^73399961 is an apocalyptic number.

It is an amenable number.

73399961 is a deficient number, since it is larger than the sum of its proper divisors (108151).

73399961 is a wasteful number, since it uses less digits than its factorization.

73399961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108150.

The product of its digits is 275562, while the sum is 47.

The square root of 73399961 is about 8567.3777201662. The cubic root of 73399961 is about 418.6958050900.

The spelling of 73399961 in words is "seventy-three million, three hundred ninety-nine thousand, nine hundred sixty-one".