1550897479 has 2 divisors, whose sum is σ = 1550897480. Its totient is φ = 1550897478.

The previous prime is 1550897473. The next prime is 1550897497. The reversal of 1550897479 is 9747980551.

It is a happy number.

Together with next prime (1550897497) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1550897479 - 2⁹ = 1550896967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1550897473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 775448739 + 775448740.

It is an arithmetic number, because the mean of its divisors is an integer number (775448740).

Almost surely, 2^1550897479 is an apocalyptic number.

1550897479 is a deficient number, since it is larger than the sum of its proper divisors (1).

1550897479 is an equidigital number, since it uses as much as digits as its factorization.

1550897479 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3175200, while the sum is 55.

The square root of 1550897479 is about 39381.4357153215. The cubic root of 1550897479 is about 1157.5178492272.

The spelling of 1550897479 in words is "one billion, five hundred fifty million, eight hundred ninety-seven thousand, four hundred seventy-nine".