61915801 has 2 divisors, whose sum is σ = 61915802. Its totient is φ = 61915800.

The previous prime is 61915757. The next prime is 61915811. The reversal of 61915801 is 10851916.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56987401 + 4928400 = 7549^2 + 2220^2 .

It is a cyclic number.

It is not a de Polignac number, because 61915801 - 2¹³ = 61907609 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61915811) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30957900 + 30957901.

It is an arithmetic number, because the mean of its divisors is an integer number (30957901).

Almost surely, 2^61915801 is an apocalyptic number.

It is an amenable number.

61915801 is a deficient number, since it is larger than the sum of its proper divisors (1).

61915801 is an equidigital number, since it uses as much as digits as its factorization.

61915801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 31.

The square root of 61915801 is about 7868.6594156819. The cubic root of 61915801 is about 395.6099128571.

The spelling of 61915801 in words is "sixty-one million, nine hundred fifteen thousand, eight hundred one".