73691897 has 4 divisors (see below), whose sum is σ = 73711860. Its totient is φ = 73671936.

The previous prime is 73691879. The next prime is 73691903. The reversal of 73691897 is 79819637.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 43705321 + 29986576 = 6611^2 + 5476^2 .

It is a cyclic number.

It is not a de Polignac number, because 73691897 - 2⁶ = 73691833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73691197) 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, 2648 + ... + 12425.

It is an arithmetic number, because the mean of its divisors is an integer number (18427965).

Almost surely, 2^73691897 is an apocalyptic number.

It is an amenable number.

73691897 is a deficient number, since it is larger than the sum of its proper divisors (19963).

73691897 is a wasteful number, since it uses less digits than its factorization.

73691897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19962.

The product of its digits is 571536, while the sum is 50.

The square root of 73691897 is about 8584.3984646567. The cubic root of 73691897 is about 419.2501681583.

The spelling of 73691897 in words is "seventy-three million, six hundred ninety-one thousand, eight hundred ninety-seven".