1799961087 has 4 divisors (see below), whose sum is σ = 2399948120. Its totient is φ = 1199974056.

The previous prime is 1799961047. The next prime is 1799961101. The reversal of 1799961087 is 7801699971.

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

It is not a de Polignac number, because 1799961087 - 2²² = 1795766783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1799961017) 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, 299993512 + ... + 299993517.

It is an arithmetic number, because the mean of its divisors is an integer number (599987030).

Almost surely, 2^1799961087 is an apocalyptic number.

1799961087 is a deficient number, since it is larger than the sum of its proper divisors (599987033).

1799961087 is an equidigital number, since it uses as much as digits as its factorization.

1799961087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 599987032.

The product of its (nonzero) digits is 1714608, while the sum is 57.

The square root of 1799961087 is about 42425.9482746114. The cubic root of 1799961087 is about 1216.4316332468.

The spelling of 1799961087 in words is "one billion, seven hundred ninety-nine million, nine hundred sixty-one thousand, eighty-seven".