1961114787 has 16 divisors (see below), whose sum is σ = 2940362880. Its totient is φ = 1291656456.

The previous prime is 1961114783. The next prime is 1961114791. The reversal of 1961114787 is 7874111691.

1961114787 is a `hidden beast` number, since 19 + 611 + 14 + 7 + 8 + 7 = 666.

It is an interprime number because it is at equal distance from previous prime (1961114783) and next prime (1961114791).

It is not a de Polignac number, because 1961114787 - 2² = 1961114783 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1961114783) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 435313 + ... + 439794.

It is an arithmetic number, because the mean of its divisors is an integer number (183772680).

Almost surely, 2^1961114787 is an apocalyptic number.

1961114787 is a deficient number, since it is larger than the sum of its proper divisors (979248093).

1961114787 is an equidigital number, since it uses as much as digits as its factorization.

1961114787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 875199 (or 875193 counting only the distinct ones).

The product of its digits is 84672, while the sum is 45.

The square root of 1961114787 is about 44284.4756884396. The cubic root of 1961114787 is about 1251.7021689379.

The spelling of 1961114787 in words is "one billion, nine hundred sixty-one million, one hundred fourteen thousand, seven hundred eighty-seven".