72691351 has 2 divisors, whose sum is σ = 72691352. Its totient is φ = 72691350.

The previous prime is 72691349. The next prime is 72691361. The reversal of 72691351 is 15319627.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72691351 - 2¹ = 72691349 is a prime.

Together with 72691349, 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 (72691331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36345675 + 36345676.

It is an arithmetic number, because the mean of its divisors is an integer number (36345676).

Almost surely, 2^72691351 is an apocalyptic number.

72691351 is a deficient number, since it is larger than the sum of its proper divisors (1).

72691351 is an equidigital number, since it uses as much as digits as its factorization.

72691351 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11340, while the sum is 34.

The square root of 72691351 is about 8525.9222961507. The cubic root of 72691351 is about 417.3440698009.

The spelling of 72691351 in words is "seventy-two million, six hundred ninety-one thousand, three hundred fifty-one".