61162987 has 2 divisors, whose sum is σ = 61162988. Its totient is φ = 61162986.

The previous prime is 61162973. The next prime is 61163009. The reversal of 61162987 is 78926116.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61162987 is a prime.

It is not a weakly prime, because it can be changed into another prime (61162187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30581493 + 30581494.

It is an arithmetic number, because the mean of its divisors is an integer number (30581494).

Almost surely, 2^61162987 is an apocalyptic number.

61162987 is a deficient number, since it is larger than the sum of its proper divisors (1).

61162987 is an equidigital number, since it uses as much as digits as its factorization.

61162987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 40.

The square root of 61162987 is about 7820.6768888633. The cubic root of 61162987 is about 394.0000064418. Note that the first 5 decimals are identical.

The spelling of 61162987 in words is "sixty-one million, one hundred sixty-two thousand, nine hundred eighty-seven".