1554979087 has 4 divisors (see below), whose sum is σ = 1564519000. Its totient is φ = 1545439176.

The previous prime is 1554979073. The next prime is 1554979093. The reversal of 1554979087 is 7809794551.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1554979087 is a prime.

It is a super-2 number, since 2×1554979087² = 4835919922014707138, 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 (1554979007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4769712 + ... + 4770037.

It is an arithmetic number, because the mean of its divisors is an integer number (391129750).

Almost surely, 2^1554979087 is an apocalyptic number.

1554979087 is a deficient number, since it is larger than the sum of its proper divisors (9539913).

1554979087 is an equidigital number, since it uses as much as digits as its factorization.

1554979087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9539912.

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

The square root of 1554979087 is about 39433.2231373496. The cubic root of 1554979087 is about 1158.5324006069.

The spelling of 1554979087 in words is "one billion, five hundred fifty-four million, nine hundred seventy-nine thousand, eighty-seven".