61400137 has 2 divisors, whose sum is σ = 61400138. Its totient is φ = 61400136.

The previous prime is 61400123. The next prime is 61400147. The reversal of 61400137 is 73100416.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60777616 + 622521 = 7796^2 + 789^2 .

It is a cyclic number.

It is not a de Polignac number, because 61400137 - 2¹⁹ = 60875849 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61400147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30700068 + 30700069.

It is an arithmetic number, because the mean of its divisors is an integer number (30700069).

Almost surely, 2^61400137 is an apocalyptic number.

It is an amenable number.

61400137 is a deficient number, since it is larger than the sum of its proper divisors (1).

61400137 is an equidigital number, since it uses as much as digits as its factorization.

61400137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 61400137 is about 7835.8239515701. The cubic root of 61400137 is about 394.5085743570.

The spelling of 61400137 in words is "sixty-one million, four hundred thousand, one hundred thirty-seven".