72632021 has 8 divisors (see below), whose sum is σ = 90554304. Its totient is φ = 56596320.

The previous prime is 72631997. The next prime is 72632023. The reversal of 72632021 is 12023627.

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

It is not a de Polignac number, because 72632021 - 2¹⁴ = 72615637 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 (72632023) 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, 471560 + ... + 471713.

It is an arithmetic number, because the mean of its divisors is an integer number (11319288).

Almost surely, 2^72632021 is an apocalyptic number.

It is an amenable number.

72632021 is a deficient number, since it is larger than the sum of its proper divisors (17922283).

72632021 is a wasteful number, since it uses less digits than its factorization.

72632021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 943291.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 72632021 is about 8522.4421969292. The cubic root of 72632021 is about 417.2304947885.

Adding to 72632021 its reverse (12023627), we get a palindrome (84655648).

The spelling of 72632021 in words is "seventy-two million, six hundred thirty-two thousand, twenty-one".