73691649 has 24 divisors (see below), whose sum is σ = 109343520. Its totient is φ = 47806848.

The previous prime is 73691647. The next prime is 73691663. The reversal of 73691649 is 94619637.

It is not a de Polignac number, because 73691649 - 2¹ = 73691647 is a prime.

It is not an unprimeable number, because it can be changed into a prime (73691641) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 56169 + ... + 57465.

It is an arithmetic number, because the mean of its divisors is an integer number (4555980).

Almost surely, 2^73691649 is an apocalyptic number.

It is an amenable number.

73691649 is a deficient number, since it is larger than the sum of its proper divisors (35651871).

73691649 is a wasteful number, since it uses less digits than its factorization.

73691649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1469 (or 1466 counting only the distinct ones).

The product of its digits is 244944, while the sum is 45.

The square root of 73691649 is about 8584.3840198351. The cubic root of 73691649 is about 419.2496978481.

The spelling of 73691649 in words is "seventy-three million, six hundred ninety-one thousand, six hundred forty-nine".