61438667 has 2 divisors, whose sum is σ = 61438668. Its totient is φ = 61438666.

The previous prime is 61438661. The next prime is 61438669. The reversal of 61438667 is 76683416.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61438667 - 2²⁰ = 60390091 is a prime.

Together with 61438669, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61438661) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30719333 + 30719334.

It is an arithmetic number, because the mean of its divisors is an integer number (30719334).

Almost surely, 2^61438667 is an apocalyptic number.

61438667 is a deficient number, since it is larger than the sum of its proper divisors (1).

61438667 is an equidigital number, since it uses as much as digits as its factorization.

61438667 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 41.

The square root of 61438667 is about 7838.2821459807. The cubic root of 61438667 is about 394.5910781737.

The spelling of 61438667 in words is "sixty-one million, four hundred thirty-eight thousand, six hundred sixty-seven".