61402897 has 2 divisors, whose sum is σ = 61402898. Its totient is φ = 61402896.

The previous prime is 61402877. The next prime is 61402919. The reversal of 61402897 is 79820416.

It is a Cunningham number, because it is equal to 7836²+1.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61402896 + 1 = 7836^2 + 1^2 .

It is a cyclic number.

It is not a de Polignac number, because 61402897 - 2⁷ = 61402769 is a prime.

It is not a weakly prime, because it can be changed into another prime (61402837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30701448 + 30701449.

It is an arithmetic number, because the mean of its divisors is an integer number (30701449).

Almost surely, 2^61402897 is an apocalyptic number.

It is an amenable number.

61402897 is a deficient number, since it is larger than the sum of its proper divisors (1).

61402897 is an equidigital number, since it uses as much as digits as its factorization.

61402897 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 61402897 is about 7836.0000638081. Note that the first 4 decimals coincide. The cubic root of 61402897 is about 394.5144854587.

It can be divided in two parts, 614028 and 97, that added together give a cube (614125 = 85³).

The spelling of 61402897 in words is "sixty-one million, four hundred two thousand, eight hundred ninety-seven".