61873157 has 2 divisors, whose sum is σ = 61873158. Its totient is φ = 61873156.

The previous prime is 61873079. The next prime is 61873159. The reversal of 61873157 is 75137816.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61481281 + 391876 = 7841^2 + 626^2 .

It is a cyclic number.

It is not a de Polignac number, because 61873157 - 2¹⁶ = 61807621 is a prime.

Together with 61873159, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61873157.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61873159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30936578 + 30936579.

It is an arithmetic number, because the mean of its divisors is an integer number (30936579).

Almost surely, 2^61873157 is an apocalyptic number.

It is an amenable number.

61873157 is a deficient number, since it is larger than the sum of its proper divisors (1).

61873157 is an equidigital number, since it uses as much as digits as its factorization.

61873157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35280, while the sum is 38.

The square root of 61873157 is about 7865.9492116336. The cubic root of 61873157 is about 395.5190676369.

The spelling of 61873157 in words is "sixty-one million, eight hundred seventy-three thousand, one hundred fifty-seven".