61378951 has 2 divisors, whose sum is σ = 61378952. Its totient is φ = 61378950.

The previous prime is 61378943. The next prime is 61378969. The reversal of 61378951 is 15987316.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61378951 - 2³ = 61378943 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61378351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30689475 + 30689476.

It is an arithmetic number, because the mean of its divisors is an integer number (30689476).

Almost surely, 2^61378951 is an apocalyptic number.

61378951 is a deficient number, since it is larger than the sum of its proper divisors (1).

61378951 is an equidigital number, since it uses as much as digits as its factorization.

61378951 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45360, while the sum is 40.

The square root of 61378951 is about 7834.4719668909. The cubic root of 61378951 is about 394.4631943272.

The spelling of 61378951 in words is "sixty-one million, three hundred seventy-eight thousand, nine hundred fifty-one".