72869311 has 2 divisors, whose sum is σ = 72869312. Its totient is φ = 72869310.

The previous prime is 72869309. The next prime is 72869347. The reversal of 72869311 is 11396827.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72869311 - 2¹ = 72869309 is a prime.

It is a super-2 number, since 2×72869311² = 10619872971229442, which contains 22 as substring.

Together with 72869309, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72869611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36434655 + 36434656.

It is an arithmetic number, because the mean of its divisors is an integer number (36434656).

Almost surely, 2^72869311 is an apocalyptic number.

72869311 is a deficient number, since it is larger than the sum of its proper divisors (1).

72869311 is an equidigital number, since it uses as much as digits as its factorization.

72869311 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 37.

The square root of 72869311 is about 8536.3523240316. The cubic root of 72869311 is about 417.6843671597.

The spelling of 72869311 in words is "seventy-two million, eight hundred sixty-nine thousand, three hundred eleven".