73563157 has 2 divisors, whose sum is σ = 73563158. Its totient is φ = 73563156.

The previous prime is 73563137. The next prime is 73563173. The reversal of 73563157 is 75136537.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73119601 + 443556 = 8551^2 + 666^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73563157 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73563137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36781578 + 36781579.

It is an arithmetic number, because the mean of its divisors is an integer number (36781579).

Almost surely, 2^73563157 is an apocalyptic number.

It is an amenable number.

73563157 is a deficient number, since it is larger than the sum of its proper divisors (1).

73563157 is an equidigital number, since it uses as much as digits as its factorization.

73563157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 66150, while the sum is 37.

The square root of 73563157 is about 8576.8966998560. The cubic root of 73563157 is about 419.0058820135.

The spelling of 73563157 in words is "seventy-three million, five hundred sixty-three thousand, one hundred fifty-seven".