73428197 has 2 divisors, whose sum is σ = 73428198. Its totient is φ = 73428196.

The previous prime is 73428169. The next prime is 73428221. The reversal of 73428197 is 79182437.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51394561 + 22033636 = 7169^2 + 4694^2 .

It is a cyclic number.

It is not a de Polignac number, because 73428197 - 2¹⁶ = 73362661 is a prime.

It is a super-2 number, since 2×73428197² = 10783400229341618, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73428107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36714098 + 36714099.

It is an arithmetic number, because the mean of its divisors is an integer number (36714099).

Almost surely, 2^73428197 is an apocalyptic number.

It is an amenable number.

73428197 is a deficient number, since it is larger than the sum of its proper divisors (1).

73428197 is an equidigital number, since it uses as much as digits as its factorization.

73428197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84672, while the sum is 41.

The square root of 73428197 is about 8569.0254405037. The cubic root of 73428197 is about 418.7494871309.

The spelling of 73428197 in words is "seventy-three million, four hundred twenty-eight thousand, one hundred ninety-seven".