1538633087 has 4 divisors (see below), whose sum is σ = 1538750136. Its totient is φ = 1538516040.

The previous prime is 1538633071. The next prime is 1538633113. The reversal of 1538633087 is 7803368351.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1538633087 - 2⁴ = 1538633071 is a prime.

It is a super-2 number, since 2×1538633087² = 4734783552822299138, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1538633027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35888 + ... + 66069.

It is an arithmetic number, because the mean of its divisors is an integer number (384687534).

Almost surely, 2^1538633087 is an apocalyptic number.

1538633087 is a deficient number, since it is larger than the sum of its proper divisors (117049).

1538633087 is a wasteful number, since it uses less digits than its factorization.

1538633087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117048.

The product of its (nonzero) digits is 362880, while the sum is 44.

The square root of 1538633087 is about 39225.4137900418. The cubic root of 1538633087 is about 1154.4585799726.

The spelling of 1538633087 in words is "one billion, five hundred thirty-eight million, six hundred thirty-three thousand, eighty-seven".