1541690987 has 2 divisors, whose sum is σ = 1541690988. Its totient is φ = 1541690986.

The previous prime is 1541690963. The next prime is 1541691017. The reversal of 1541690987 is 7890961451.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1541690987 - 2¹⁶ = 1541625451 is a prime.

It is a super-2 number, since 2×1541690987² = 4753622198794068338, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1541690387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 770845493 + 770845494.

It is an arithmetic number, because the mean of its divisors is an integer number (770845494).

Almost surely, 2^1541690987 is an apocalyptic number.

1541690987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1541690987 is an equidigital number, since it uses as much as digits as its factorization.

1541690987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 544320, while the sum is 50.

The square root of 1541690987 is about 39264.3729989414. The cubic root of 1541690987 is about 1155.2228693565. Note that the first 3 decimals are identical.

The spelling of 1541690987 in words is "one billion, five hundred forty-one million, six hundred ninety thousand, nine hundred eighty-seven".