61453507 has 2 divisors, whose sum is σ = 61453508. Its totient is φ = 61453506.

The previous prime is 61453451. The next prime is 61453519. The reversal of 61453507 is 70535416.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61453507 is a prime.

It is not a weakly prime, because it can be changed into another prime (61453537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30726753 + 30726754.

It is an arithmetic number, because the mean of its divisors is an integer number (30726754).

Almost surely, 2^61453507 is an apocalyptic number.

61453507 is a deficient number, since it is larger than the sum of its proper divisors (1).

61453507 is an equidigital number, since it uses as much as digits as its factorization.

61453507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 61453507 is about 7839.2287248173. The cubic root of 61453507 is about 394.6228456826.

It can be divided in two parts, 6145350 and 7, that multiplied together give a triangular number (43017450 = T₉₂₇₅).

The spelling of 61453507 in words is "sixty-one million, four hundred fifty-three thousand, five hundred seven".