472139761 has 2 divisors, whose sum is σ = 472139762. Its totient is φ = 472139760.

The previous prime is 472139737. The next prime is 472139777. The reversal of 472139761 is 167931274.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 454499761 + 17640000 = 21319^2 + 4200^2 .

It is a cyclic number.

It is not a de Polignac number, because 472139761 - 2⁵ = 472139729 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (472139711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 236069880 + 236069881.

It is an arithmetic number, because the mean of its divisors is an integer number (236069881).

Almost surely, 2^472139761 is an apocalyptic number.

It is an amenable number.

472139761 is a deficient number, since it is larger than the sum of its proper divisors (1).

472139761 is an equidigital number, since it uses as much as digits as its factorization.

472139761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 63504, while the sum is 40.

The square root of 472139761 is about 21728.7772550597. Note that the first 3 decimals coincide. The cubic root of 472139761 is about 778.6761243298.

The spelling of 472139761 in words is "four hundred seventy-two million, one hundred thirty-nine thousand, seven hundred sixty-one".