61287937 has 2 divisors, whose sum is σ = 61287938. Its totient is φ = 61287936.

The previous prime is 61287931. The next prime is 61287971. The reversal of 61287937 is 73978216.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46840336 + 14447601 = 6844^2 + 3801^2 .

It is a cyclic number.

It is not a de Polignac number, because 61287937 - 2³ = 61287929 is a prime.

It is a super-2 number, since 2×61287937² = 7512422443431938, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 61287893 and 61287902.

It is not a weakly prime, because it can be changed into another prime (61287931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30643968 + 30643969.

It is an arithmetic number, because the mean of its divisors is an integer number (30643969).

Almost surely, 2^61287937 is an apocalyptic number.

It is an amenable number.

61287937 is a deficient number, since it is larger than the sum of its proper divisors (1).

61287937 is an equidigital number, since it uses as much as digits as its factorization.

61287937 is an evil number, because the sum of its binary digits is even.

The product of its digits is 127008, while the sum is 43.

The square root of 61287937 is about 7828.6612520916. The cubic root of 61287937 is about 394.2681251030.

The spelling of 61287937 in words is "sixty-one million, two hundred eighty-seven thousand, nine hundred thirty-seven".