73903949 has 4 divisors (see below), whose sum is σ = 84461664. Its totient is φ = 63346236.

The previous prime is 73903943. The next prime is 73903961. The reversal of 73903949 is 94930937.

It is a happy number.

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: 94930937 = 37 ⋅2565701.

It is a cyclic number.

It is not a de Polignac number, because 73903949 - 2⁴ = 73903933 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73903943) 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, 5278847 + ... + 5278860.

It is an arithmetic number, because the mean of its divisors is an integer number (21115416).

Almost surely, 2^73903949 is an apocalyptic number.

It is an amenable number.

73903949 is a deficient number, since it is larger than the sum of its proper divisors (10557715).

73903949 is a wasteful number, since it uses less digits than its factorization.

73903949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10557714.

The product of its (nonzero) digits is 183708, while the sum is 44.

The square root of 73903949 is about 8596.7406032752. The cubic root of 73903949 is about 419.6519206000.

The spelling of 73903949 in words is "seventy-three million, nine hundred three thousand, nine hundred forty-nine".