71920761 has 16 divisors (see below), whose sum is σ = 110766528. Its totient is φ = 41024000.

The previous prime is 71920759. The next prime is 71920777. The reversal of 71920761 is 16702917.

It is a cyclic number.

It is not a de Polignac number, because 71920761 - 2¹ = 71920759 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (71920061) 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 in 15 ways as a sum of consecutive naturals, for example, 63540 + ... + 64661.

It is an arithmetic number, because the mean of its divisors is an integer number (6922908).

Almost surely, 2^71920761 is an apocalyptic number.

It is an amenable number.

71920761 is a deficient number, since it is larger than the sum of its proper divisors (38845767).

71920761 is a wasteful number, since it uses less digits than its factorization.

71920761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128232.

The product of its (nonzero) digits is 5292, while the sum is 33.

The square root of 71920761 is about 8480.6108860152. The cubic root of 71920761 is about 415.8640939954.

The spelling of 71920761 in words is "seventy-one million, nine hundred twenty thousand, seven hundred sixty-one".