73749631 has 4 divisors (see below), whose sum is σ = 73874592. Its totient is φ = 73624672.

The previous prime is 73749629. The next prime is 73749691. The reversal of 73749631 is 13694737.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13694737 = 7 ⋅1956391.

It is a cyclic number.

It is not a de Polignac number, because 73749631 - 2¹ = 73749629 is a prime.

It is a super-2 number, since 2×73749631² = 10878016145272322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73749691) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61591 + ... + 62776.

It is an arithmetic number, because the mean of its divisors is an integer number (18468648).

Almost surely, 2^73749631 is an apocalyptic number.

73749631 is a deficient number, since it is larger than the sum of its proper divisors (124961).

73749631 is a wasteful number, since it uses less digits than its factorization.

73749631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124960.

The product of its digits is 95256, while the sum is 40.

The square root of 73749631 is about 8587.7605346214. The cubic root of 73749631 is about 419.3596269175.

The spelling of 73749631 in words is "seventy-three million, seven hundred forty-nine thousand, six hundred thirty-one".