481157909 has 2 divisors, whose sum is σ = 481157910. Its totient is φ = 481157908.

The previous prime is 481157801. The next prime is 481157923. The reversal of 481157909 is 909751184.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 436935409 + 44222500 = 20903^2 + 6650^2 .

It is a cyclic number.

It is not a de Polignac number, because 481157909 - 2¹⁶ = 481092373 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 481157909.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (481157959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 240578954 + 240578955.

It is an arithmetic number, because the mean of its divisors is an integer number (240578955).

Almost surely, 2^481157909 is an apocalyptic number.

It is an amenable number.

481157909 is a deficient number, since it is larger than the sum of its proper divisors (1).

481157909 is an equidigital number, since it uses as much as digits as its factorization.

481157909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 44.

The square root of 481157909 is about 21935.3119193687. The cubic root of 481157909 is about 783.6026143870.

The spelling of 481157909 in words is "four hundred eighty-one million, one hundred fifty-seven thousand, nine hundred nine".