61391801 has 12 divisors (see below), whose sum is σ = 64095600. Its totient is φ = 58784160.

The previous prime is 61391797. The next prime is 61391819. The reversal of 61391801 is 10819316.

It is a happy number.

It is not a de Polignac number, because 61391801 - 2² = 61391797 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (61391881) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 98870 + ... + 99488.

It is an arithmetic number, because the mean of its divisors is an integer number (5341300).

Almost surely, 2^61391801 is an apocalyptic number.

It is an amenable number.

61391801 is a deficient number, since it is larger than the sum of its proper divisors (2703799).

61391801 is an equidigital number, since it uses as much as digits as its factorization.

61391801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 760 (or 719 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 61391801 is about 7835.2920175320. The cubic root of 61391801 is about 394.4907200412.

The spelling of 61391801 in words is "sixty-one million, three hundred ninety-one thousand, eight hundred one".