61428743 has 2 divisors, whose sum is σ = 61428744. Its totient is φ = 61428742.

The previous prime is 61428739. The next prime is 61428761. The reversal of 61428743 is 34782416.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61428743 - 2² = 61428739 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61428793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30714371 + 30714372.

It is an arithmetic number, because the mean of its divisors is an integer number (30714372).

Almost surely, 2^61428743 is an apocalyptic number.

61428743 is a deficient number, since it is larger than the sum of its proper divisors (1).

61428743 is an equidigital number, since it uses as much as digits as its factorization.

61428743 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32256, while the sum is 35.

The square root of 61428743 is about 7837.6490735424. The cubic root of 61428743 is about 394.5698313330.

The spelling of 61428743 in words is "sixty-one million, four hundred twenty-eight thousand, seven hundred forty-three".