61890707 has 2 divisors, whose sum is σ = 61890708. Its totient is φ = 61890706.

The previous prime is 61890649. The next prime is 61890757. The reversal of 61890707 is 70709816.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61890707 - 2⁶ = 61890643 is a prime.

It is a super-2 number, since 2×61890707² = 7660919225919698, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (61890757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30945353 + 30945354.

It is an arithmetic number, because the mean of its divisors is an integer number (30945354).

Almost surely, 2^61890707 is an apocalyptic number.

61890707 is a deficient number, since it is larger than the sum of its proper divisors (1).

61890707 is an equidigital number, since it uses as much as digits as its factorization.

61890707 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21168, while the sum is 38.

The square root of 61890707 is about 7867.0647003822. The cubic root of 61890707 is about 395.5564597457.

The spelling of 61890707 in words is "sixty-one million, eight hundred ninety thousand, seven hundred seven".