73642989 has 8 divisors (see below), whose sum is σ = 112217920. Its totient is φ = 42081696.

The previous prime is 73642979. The next prime is 73642999. The reversal of 73642989 is 98924637.

It is an interprime number because it is at equal distance from previous prime (73642979) and next prime (73642999).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 73642989 - 2⁴ = 73642973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73642969) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1753384 + ... + 1753425.

It is an arithmetic number, because the mean of its divisors is an integer number (14027240).

Almost surely, 2^73642989 is an apocalyptic number.

It is an amenable number.

73642989 is a deficient number, since it is larger than the sum of its proper divisors (38574931).

73642989 is a wasteful number, since it uses less digits than its factorization.

73642989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3506819.

The product of its digits is 653184, while the sum is 48.

The square root of 73642989 is about 8581.5493356386. The cubic root of 73642989 is about 419.1573980079.

The spelling of 73642989 in words is "seventy-three million, six hundred forty-two thousand, nine hundred eighty-nine".