73099661 has 2 divisors, whose sum is σ = 73099662. Its totient is φ = 73099660.

The previous prime is 73099657. The next prime is 73099687. The reversal of 73099661 is 16699037.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70879561 + 2220100 = 8419^2 + 1490^2 .

It is a cyclic number.

It is not a de Polignac number, because 73099661 - 2² = 73099657 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73099601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36549830 + 36549831.

It is an arithmetic number, because the mean of its divisors is an integer number (36549831).

Almost surely, 2^73099661 is an apocalyptic number.

It is an amenable number.

73099661 is a deficient number, since it is larger than the sum of its proper divisors (1).

73099661 is an equidigital number, since it uses as much as digits as its factorization.

73099661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 61236, while the sum is 41.

The square root of 73099661 is about 8549.8339749962. The cubic root of 73099661 is about 418.1240236206.

The spelling of 73099661 in words is "seventy-three million, ninety-nine thousand, six hundred sixty-one".