61357397 has 2 divisors, whose sum is σ = 61357398. Its totient is φ = 61357396.

The previous prime is 61357379. The next prime is 61357421. The reversal of 61357397 is 79375316.

Together with previous prime (61357379) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57138481 + 4218916 = 7559^2 + 2054^2 .

It is a cyclic number.

It is not a de Polignac number, because 61357397 - 2¹⁶ = 61291861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61357337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30678698 + 30678699.

It is an arithmetic number, because the mean of its divisors is an integer number (30678699).

Almost surely, 2^61357397 is an apocalyptic number.

It is an amenable number.

61357397 is a deficient number, since it is larger than the sum of its proper divisors (1).

61357397 is an equidigital number, since it uses as much as digits as its factorization.

61357397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 119070, while the sum is 41.

The square root of 61357397 is about 7833.0962588238. The cubic root of 61357397 is about 394.4170153306.

The spelling of 61357397 in words is "sixty-one million, three hundred fifty-seven thousand, three hundred ninety-seven".