1461994477 has 2 divisors, whose sum is σ = 1461994478. Its totient is φ = 1461994476.

The previous prime is 1461994439. The next prime is 1461994531. The reversal of 1461994477 is 7744991641.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1362274281 + 99720196 = 36909^2 + 9986^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1461994477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1461997477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 730997238 + 730997239.

It is an arithmetic number, because the mean of its divisors is an integer number (730997239).

Almost surely, 2^1461994477 is an apocalyptic number.

It is an amenable number.

1461994477 is a deficient number, since it is larger than the sum of its proper divisors (1).

1461994477 is an equidigital number, since it uses as much as digits as its factorization.

1461994477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1524096, while the sum is 52.

The square root of 1461994477 is about 38236.0363662344. The cubic root of 1461994477 is about 1134.9635409120.

The spelling of 1461994477 in words is "one billion, four hundred sixty-one million, nine hundred ninety-four thousand, four hundred seventy-seven".