1987702025 has 6 divisors (see below), whose sum is σ = 2464750542. Its totient is φ = 1590161600.

The previous prime is 1987701997. The next prime is 1987702027. The reversal of 1987702025 is 5202077891.

It can be written as a sum of positive squares in 3 ways, for example, as 319551376 + 1668150649 = 17876^2 + 40843^2 .

It is not a de Polignac number, because 1987702025 - 2¹⁴ = 1987685641 is a prime.

It is a super-4 number, since 4×1987702025⁴ (a number of 38 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1987702027) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 39754016 + ... + 39754065.

It is an arithmetic number, because the mean of its divisors is an integer number (410791757).

Almost surely, 2^1987702025 is an apocalyptic number.

It is an amenable number.

1987702025 is a deficient number, since it is larger than the sum of its proper divisors (477048517).

1987702025 is an equidigital number, since it uses as much as digits as its factorization.

1987702025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79508091 (or 79508086 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 41.

The square root of 1987702025 is about 44583.6519926307. The cubic root of 1987702025 is about 1257.3333257348. Note that the first 4 decimals are identical.

The spelling of 1987702025 in words is "one billion, nine hundred eighty-seven million, seven hundred two thousand, twenty-five".