61699051 has 2 divisors, whose sum is σ = 61699052. Its totient is φ = 61699050.

The previous prime is 61699039. The next prime is 61699067. The reversal of 61699051 is 15099616.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61699051 - 2¹¹ = 61697003 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61699051.

It is not a weakly prime, because it can be changed into another prime (61699031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30849525 + 30849526.

It is an arithmetic number, because the mean of its divisors is an integer number (30849526).

Almost surely, 2^61699051 is an apocalyptic number.

61699051 is a deficient number, since it is larger than the sum of its proper divisors (1).

61699051 is an equidigital number, since it uses as much as digits as its factorization.

61699051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14580, while the sum is 37.

The square root of 61699051 is about 7854.8743465443. The cubic root of 61699051 is about 395.1477330216.

The spelling of 61699051 in words is "sixty-one million, six hundred ninety-nine thousand, fifty-one".