172377461 has 2 divisors, whose sum is σ = 172377462. Its totient is φ = 172377460.

The previous prime is 172377437. The next prime is 172377463. The reversal of 172377461 is 164773271.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 127554436 + 44823025 = 11294^2 + 6695^2 .

It is a cyclic number.

It is not a de Polignac number, because 172377461 - 2¹⁰ = 172376437 is a prime.

It is a Sophie Germain prime.

Together with 172377463, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172377463) 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 as a sum of consecutive naturals, namely, 86188730 + 86188731.

It is an arithmetic number, because the mean of its divisors is an integer number (86188731).

Almost surely, 2^172377461 is an apocalyptic number.

It is an amenable number.

172377461 is a deficient number, since it is larger than the sum of its proper divisors (1).

172377461 is an equidigital number, since it uses as much as digits as its factorization.

172377461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 49392, while the sum is 38.

The square root of 172377461 is about 13129.2597277988. The cubic root of 172377461 is about 556.5362958987.

The spelling of 172377461 in words is "one hundred seventy-two million, three hundred seventy-seven thousand, four hundred sixty-one".