72950431 has 2 divisors, whose sum is σ = 72950432. Its totient is φ = 72950430.

The previous prime is 72950429. The next prime is 72950473. The reversal of 72950431 is 13405927.

It is a weak prime.

It is an emirp because it is prime and its reverse (13405927) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72950431 - 2¹ = 72950429 is a prime.

It is a super-2 number, since 2×72950431² = 10643530766171522, which contains 22 as substring.

Together with 72950429, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 72950393 and 72950402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72950401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36475215 + 36475216.

It is an arithmetic number, because the mean of its divisors is an integer number (36475216).

Almost surely, 2^72950431 is an apocalyptic number.

72950431 is a deficient number, since it is larger than the sum of its proper divisors (1).

72950431 is an equidigital number, since it uses as much as digits as its factorization.

72950431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 72950431 is about 8541.1024464059. The cubic root of 72950431 is about 417.8393020250.

The spelling of 72950431 in words is "seventy-two million, nine hundred fifty thousand, four hundred thirty-one".