72977503231 has 2 divisors, whose sum is σ = 72977503232. Its totient is φ = 72977503230.

The previous prime is 72977503213. The next prime is 72977503243. The reversal of 72977503231 is 13230577927.

It is a happy number.

Together with previous prime (72977503213) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72977503231 - 2¹¹ = 72977501183 is a prime.

It is a super-2 number, since 2×72977503231² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72977503331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36488751615 + 36488751616.

It is an arithmetic number, because the mean of its divisors is an integer number (36488751616).

Almost surely, 2^72977503231 is an apocalyptic number.

72977503231 is a deficient number, since it is larger than the sum of its proper divisors (1).

72977503231 is an equidigital number, since it uses as much as digits as its factorization.

72977503231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 555660, while the sum is 46.

The spelling of 72977503231 in words is "seventy-two billion, nine hundred seventy-seven million, five hundred three thousand, two hundred thirty-one".