73973157 has 4 divisors (see below), whose sum is σ = 98630880. Its totient is φ = 49315436.

The previous prime is 73973111. The next prime is 73973173. The reversal of 73973157 is 75137937.

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.

It is a cyclic number.

It is not a de Polignac number, because 73973157 - 2¹⁵ = 73940389 is a prime.

It is a super-3 number, since 3×73973157³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73973057) 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, 12328857 + ... + 12328862.

It is an arithmetic number, because the mean of its divisors is an integer number (24657720).

Almost surely, 2^73973157 is an apocalyptic number.

It is an amenable number.

73973157 is a deficient number, since it is larger than the sum of its proper divisors (24657723).

73973157 is a wasteful number, since it uses less digits than its factorization.

73973157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24657722.

The product of its digits is 138915, while the sum is 42.

The square root of 73973157 is about 8600.7649078440. The cubic root of 73973157 is about 419.7828753021.

The spelling of 73973157 in words is "seventy-three million, nine hundred seventy-three thousand, one hundred fifty-seven".