1538690479 has 2 divisors, whose sum is σ = 1538690480. Its totient is φ = 1538690478.

The previous prime is 1538690449. The next prime is 1538690513. The reversal of 1538690479 is 9740968351.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1538690479 - 2¹⁵ = 1538657711 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1538690449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 769345239 + 769345240.

It is an arithmetic number, because the mean of its divisors is an integer number (769345240).

Almost surely, 2^1538690479 is an apocalyptic number.

1538690479 is a deficient number, since it is larger than the sum of its proper divisors (1).

1538690479 is an equidigital number, since it uses as much as digits as its factorization.

1538690479 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1632960, while the sum is 52.

The square root of 1538690479 is about 39226.1453497537. The cubic root of 1538690479 is about 1154.4729338090.

The spelling of 1538690479 in words is "one billion, five hundred thirty-eight million, six hundred ninety thousand, four hundred seventy-nine".