61438471 has 2 divisors, whose sum is σ = 61438472. Its totient is φ = 61438470.

The previous prime is 61438441. The next prime is 61438499. The reversal of 61438471 is 17483416.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61438471 - 2¹¹ = 61436423 is a prime.

It is a super-3 number, since 3×61438471³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61438441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30719235 + 30719236.

It is an arithmetic number, because the mean of its divisors is an integer number (30719236).

Almost surely, 2^61438471 is an apocalyptic number.

61438471 is a deficient number, since it is larger than the sum of its proper divisors (1).

61438471 is an equidigital number, since it uses as much as digits as its factorization.

61438471 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 34.

The square root of 61438471 is about 7838.2696432312. The cubic root of 61438471 is about 394.5906585686.

The spelling of 61438471 in words is "sixty-one million, four hundred thirty-eight thousand, four hundred seventy-one".