73143957 has 4 divisors (see below), whose sum is σ = 97525280. Its totient is φ = 48762636.

The previous prime is 73143953. The next prime is 73144007. The reversal of 73143957 is 75934137.

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: 75934137 = 3 ⋅25311379.

It is not a de Polignac number, because 73143957 - 2² = 73143953 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73143953) 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, 12190657 + ... + 12190662.

It is an arithmetic number, because the mean of its divisors is an integer number (24381320).

Almost surely, 2^73143957 is an apocalyptic number.

It is an amenable number.

73143957 is a deficient number, since it is larger than the sum of its proper divisors (24381323).

73143957 is a wasteful number, since it uses less digits than its factorization.

73143957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24381322.

The product of its digits is 79380, while the sum is 39.

The square root of 73143957 is about 8552.4240423403. The cubic root of 73143957 is about 418.2084630542.

The spelling of 73143957 in words is "seventy-three million, one hundred forty-three thousand, nine hundred fifty-seven".