73997649 has 12 divisors (see below), whose sum is σ = 116602512. Its totient is φ = 44847000.

The previous prime is 73997639. The next prime is 73997657. The reversal of 73997649 is 94679937.

73997649 = 12² + 13² + ... + 605².

It is not a de Polignac number, because 73997649 - 2¹⁵ = 73964881 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 73997595 and 73997604.

It is not an unprimeable number, because it can be changed into a prime (73997629) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 373627 + ... + 373824.

It is an arithmetic number, because the mean of its divisors is an integer number (9716876).

Almost surely, 2^73997649 is an apocalyptic number.

It is an amenable number.

73997649 is a deficient number, since it is larger than the sum of its proper divisors (42604863).

73997649 is a wasteful number, since it uses less digits than its factorization.

73997649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 747468 (or 747465 counting only the distinct ones).

The product of its digits is 2571912, while the sum is 54.

The square root of 73997649 is about 8602.1886168579. The cubic root of 73997649 is about 419.8291992576.

The spelling of 73997649 in words is "seventy-three million, nine hundred ninety-seven thousand, six hundred forty-nine".