912721477 has 2 divisors, whose sum is σ = 912721478. Its totient is φ = 912721476.

The previous prime is 912721471. The next prime is 912721493. The reversal of 912721477 is 774127219.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 542004961 + 370716516 = 23281^2 + 19254^2 .

It is a cyclic number.

It is not a de Polignac number, because 912721477 - 2⁷ = 912721349 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (912721471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 456360738 + 456360739.

It is an arithmetic number, because the mean of its divisors is an integer number (456360739).

Almost surely, 2^912721477 is an apocalyptic number.

It is an amenable number.

912721477 is a deficient number, since it is larger than the sum of its proper divisors (1).

912721477 is an equidigital number, since it uses as much as digits as its factorization.

912721477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 49392, while the sum is 40.

The square root of 912721477 is about 30211.2806249586. The cubic root of 912721477 is about 970.0171736783.

The spelling of 912721477 in words is "nine hundred twelve million, seven hundred twenty-one thousand, four hundred seventy-seven".