61292971 has 2 divisors, whose sum is σ = 61292972. Its totient is φ = 61292970.

The previous prime is 61292911. The next prime is 61292977. The reversal of 61292971 is 17929216.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61292971 - 2⁷ = 61292843 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61292971.

It is not a weakly prime, because it can be changed into another prime (61292977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30646485 + 30646486.

It is an arithmetic number, because the mean of its divisors is an integer number (30646486).

Almost surely, 2^61292971 is an apocalyptic number.

61292971 is a deficient number, since it is larger than the sum of its proper divisors (1).

61292971 is an equidigital number, since it uses as much as digits as its factorization.

61292971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13608, while the sum is 37.

The square root of 61292971 is about 7828.9827563995. The cubic root of 61292971 is about 394.2789194589.

It can be divided in two parts, 61 and 292971, that multiplied together give a triangular number (17871231 = T₅₉₇₈).

The spelling of 61292971 in words is "sixty-one million, two hundred ninety-two thousand, nine hundred seventy-one".