61860901 has 2 divisors, whose sum is σ = 61860902. Its totient is φ = 61860900.

The previous prime is 61860863. The next prime is 61860947. The reversal of 61860901 is 10906816.

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., 49364676 + 12496225 = 7026^2 + 3535^2 .

It is a cyclic number.

It is not a de Polignac number, because 61860901 - 2²¹ = 59763749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61860971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30930450 + 30930451.

It is an arithmetic number, because the mean of its divisors is an integer number (30930451).

Almost surely, 2^61860901 is an apocalyptic number.

It is an amenable number.

61860901 is a deficient number, since it is larger than the sum of its proper divisors (1).

61860901 is an equidigital number, since it uses as much as digits as its factorization.

61860901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 61860901 is about 7865.1701189485. The cubic root of 61860901 is about 395.4929507551.

The spelling of 61860901 in words is "sixty-one million, eight hundred sixty thousand, nine hundred one".